Arcade Fire had just released their fifth studio album, Everything Now, on July 28, but instead of ending with one of their new tracks or a fan favorite, the band opted for a John Lennon cover. "There's so much poison in the air," the band told the crowd before their final song. "We need love and peace," making the Lennon lyrics like, "Love is the answer and you know that for sure" ring louder and more true than ever, setting a positive final message for those who opted to see the band as their final act of the 2017 fest.

While Big Sean is known for his bombastic raps and crazy confidence, the rapper showed a different side of himself when making a plea for people to follow their dreams, especially in today's uncertain world. 

"True success is dreaming something and seeing it manifest in the palm of your hand," the Detroit MC told the crowd over calm piano chords. "Even with Donald Trump as our president, we're still here. Everybody has a different rate of success, everybody has a different, don't let nobody steal your dreams...I wouldn't be telling you this shit if I didn't care about you. So if you truly feel that if you deserve to have what you want in life, you deserve to do what the fuck you want to do with your life, when this beat comes back in, I need to see you guys clap it up," which inspired some of the biggest audience participation of the festival.

Charli XCX's new single is titled "Boys," but she was all about her fellow females at Lolla. The singer-songwriter not only brought a super-special guest in Halsey to perform a Spice Girls cover, but brought out local rapper Cupcakke to give the rising Chicagoan a major platform to get further noticed.

Read more about Charli's girl-powerful set here.

Sampha truly proved why he's more than worthy of his widespread acclaim with a set that showcased all his different musical approaches and talents. He nailed the tender rendition of "(No One Knows Me) Like the Piano," had a drum circle with his band mates and brought the focus to his vocals to hit the growls in "Summer Rain" and high falsetto note in "Blood on Me."

While playing for a massive crowd at the Grant Park stage, Tove Lo told the crowd that she first played Lollapalooza two years ago (when her singles "Habits (Stay High)" and "Talking Body" were beginning to blow up) and that seeing "all your faces makes me happy." Those faces continued to support her as she strutted through her racy, electro-pop discography, and during "Talking Body" pulled out her signature festival move of flashing the crowd.

Below watch our Lollapalooza interview with Tove Lo where she gives us updates on her "Fire Fade" short film and upcoming Lady Wood Phase Two album, and when both will drop:

Machine Gun Kelly's Lollapalooza set varied from being an intense rap show to full-fledged rock concert, but the rapper-singer took a moment to pay tribute to his friend Chester Bennington, performing his heartfelt cover of Linkin Park's "Numb" that felt as if he would soon break into tears. It was a rare moment to see the MC so vulnerable.

Read more about MGK's tribute here, and watch Fuse's interview with MGK about the tribute:

The sun was just beginning to set over Chicago's Grant Park as London Grammar started their set at the Lake Shore stage. The band's dreamy electronica-pop sound and Hannah Reid's gorgeous vocals effortlessly floated through the festival's south field, casting a spell and captivating a crowd that was still raring to go in the final hours of the four-day fest.

In what will likely go down as the standout performance at Lollapalooza 2017, hometown hero Chance the Rapper gave an unforgettable show that went way past the 10:00pm festival end. But it didn't matter: This was Chance's moment where he got to give platforms to Vic Mensa and Francis and the Lights, perform Kanye West covers, spray the audience with a fire hose, and more to a humongous crowd that overflowed into Grant Park's south field to watch the MC.

Lollapalooza 2017 marked Zara Larsson's first-ever U.S. festival performance and it's likely set to be the year's best vocal performance at the fest. From handling every vocal run both she and MNEK hit in "Never Forget You" to the slew of belts throughout her recently released So Good album, the 19-year-old Larsson is, vocally, proving to be nearly on a Christina Aguilera level.

Watch Zara play Emoji Tower with Fuse at Lolla below:

While there's been few major political statements at Lolla this year, especially at the EDM-focused Perry's stage, G Jones took the final moment of his early Day 3 set to stir disdain for our current President. "Chicago, I want you to put your hands in the air and yell 'Fuck Donald Trump!' To which the crowd easily agreed to as G Jones walked offstage. 

Banks brought one of Lolla's most visually captivating performances with tons of fog and a gorgeous use of lighting that made her and her backup dancer look like creep-walking phantoms through hues of red, blues and purples. While we loved the fantasy, it was admittedly very fun when Banks broke out of her witchy character during "Begging for Thread," adorably yipping to the crowd to "Scream it...louder!"

Alt-J was the final act to perform on the massive Grant Park stage before headliner Chance the Rapper would take the stage and the English rockers brought a captivating set as the sun was setting. While those in the front rows wouldn't have likely noticed, but those filling the southern Grant Park field would see the band projected on the LED screens in black-and-white, enhanced by a slew of trippy visual effects to add to their experimental sound.

Alison Wonderland's 6:00pm set brought literal fire for a pyrotechnic-heavy set that is typically reserved for the later sets when nighttime falls. While Ms. Wonderland was apparently encountering some technical difficulties (though no one raging at the stage likely noticed), she laughed off the technicians helping her out, yelling "At least you know it's live!" giving a rare glimpse of a veteran performer confirming she's the real deal.

While Vance Joy's gorgeous singer-songwriter tendencies had the crowd eating out of the palm of his hand through cuts like "Mess Is Mine" and "From Afar," the final two songs made staying for the full set all the more worth it as he pulled out an unexpected mashup of Paul Simon's "You Can Call Me Al" and Omi's "Cheerleader," before closing with breakout hit "Riptide."

Léon's brand of intimate singer-songwriter paired well with the shaded Pepsi stage with the Swedish songbird's like "Liar," "Treasure" and "Tired of Talking" hitting the audience even harder, as did the never-performed-song "Surround Me" that made its live debut just for Lolla.

Watch Léon talk "Surround Me" and her upcoming single during Emoji Tower below:

With his signature three-piece suits, Jidenna is always one of the best dressed artists at festivals, but the "Classic Man" was likely thanking his lucky stars he was rocking so many layers at his afternoon set on Day 2. "Y'all are some cold motherfuckers, aren't you?" he joked with the crowd who were battling balmy, 60-degree weather to see him rock through joints on his recently released album The Chief including standouts like "Little Bit More" and "Bambi." While the singer-rapper eventually changed into a hoodie himself, he undoubtedly warmed up the crowd when delivering an inspiring message saying, it doesn't matter how they dress, how they vote, who they love or "who you fuck," that there will "always gonna be someone's gonna feel some kind of way" about your decisions and he encouraged the crowd not to focus on such negativity.

Likely reeling off the buzz of just releasing his debut full-length album Out of Light, Slushii stayed true to his name with a slew of hard-hitting, sugar-coated EDM to get the early ravers at the Perry's stage moving. The Los Angeles–based producer is highly inspired by Tokyo, which was felt with his LED screens incorporating anime clips and Japanese typography, through a barrage of technicolor, 8bit-inspired visuals.

Lollapalooza was one of Mura Masa's first festivals since dropping his excellent, self-titled album and the crowd was clearly here for him. The Pepsi stage was overflowing with excited fans as the singer-producer showcased his multi-instrumental talents playing percussion, utilizing a vocoder, electro-xylophone, and singing. Despite Mura Masa's soft-spoken approach to the crowd (a hypewoman who sang a majority of the tracks mostly handled the crowd shoutouts), the audience was incredibly supportive, not only belting out the chorus of his Charli XCX–featuring breakout "1 Night," but even set closer "Firefly," all indicating the British producer's U.S. following is growing passionately. 

While Tegan and Sara have long about inclusion and making their performances a safe space, the folk duo put a new spin on inclusivity by shouting out teenagers, lesbians, pilots, females, Lorde, and quite literally everyone in attendance at their set. While most of the set was lighthearted and there was no overt political discussions, there was an obvious sense that the band was looking to make all feel welcome and included in their career-ranging set.

Read more about why Tegan and Sara's pulled of Lollapalooza's most inclusive set here and watch the band play Fuse's Emoji Tower below:

While the previous night's headliners got rained out, Blink-182 made sure to deliver a crowd-pleasing set that ranged from their pop-punk classics ("Rock Show," "All the Small Things") and a slew of cuts from their recently released California album ("Cynical," "Kings of the Weekend"), and unexpected moments like when the stage went completely dark or when the audience was treated to the Stranger Things theme song.

Read more about Blink-182 bringing California, nostalgia and Stranger Things to Lollapalooza here.

Lolla was one of the first festivals Lorde is playing after releasing her No. 1 album Melodrama in June and she looked ready to give one of her best shows yet...until Mother Nature decided otherwise. The singer opened with a powerful, orchestral-inspired snippet of single "Green Light" before moving into 2013 single "Tennis Court." Speaking to the crowd, the 20-year-old told the crowd she was about to play a song she's never played before, until she got word that she was being pulled off stage due to weather which led the whole festival to be evacuated. While we're dying to know which song she was about to play, Chicagoans may get the chance to see if a club show Lorde said her team is looking to playing comes to fruition. 

Read more about the weather that cut Day 1 of Lollapalooza 2017 short and read on for more best moments.

As people were deciding which acts they were going to see for their headliners, those walking towards Lorde at the Bud Light stage were treated to Pham's stage that seemed to play right along with the rain showers that were quickly becoming more aggressive through the night. The future-bass producer brought his unique sound that led the soaked crowd into a dance jam session, making for a super-fun way to deal with the rain.

Wiz Khalifa was one of the biggest names to come out for Day 1 and while his set was filled with unexpected surprises (including a cameo from Ty Dolla $ign for their first performance of their songs "Sign" and "Something New"), perhaps the wildest sight was seeing the rapper and his crew throw inflatable joints into the crowd through the set. Wiz spent a section of the song holding the oversized joint like an emperor with his sceptre as the floating doobies made their way over the Bud Light stage crowd.

With a rising profile both in the pop and electronic worlds, Cheat Codes brought an exuberant set that got a crowd turned up early in the day. The DJ trio ended their set with rising hit "No Promises," unfortunately not bringing out featured vocalist Demi Lovato, but still had the crowd roaring them off Perry's stage with big screams.

Plus, watch our interview with Cheat Codes at Lollapalooza yesterday where they play our Emoji Tower game to pick their own questions and praise Demi Lovato:

A few artists at Day 1 were plagued by time issues (Liam Gallagher walked off stage after three songs so he's unfortunately barred from making our "best moments") and Migos had a 30-plus minute delay due to plane issues. Luckily, the guys did their best to make up for the delay by flying through snippet versions of their biggest bangers, but made sure to play breakout hit "Bad and Boujee" in full, creating a sea of festivalgoers jumping and throwing their hands in the air together.

Even with the sun still out shining, the visuals A-Trak's brought into his high-turbo, 5:45 set were bright, vibrant and crystal clear at Perry's stage, a stage that sometimes struggles to give attendees the full light-show experience during daylight. Our favorite A-Trak visual though? When he threw up the phrase "No Requests"—the dude's a professional, don't forget!

Before torrential downpour took over the Grant Park festival grounds, attendees at the Pepsi stage were soothed by Kaytranada's chilled-out set. The DJ-producer was accompanied by humongous white balloons and backed by visuals that ranged from vintage dance clips to videos of colorful and trippy designs, all setting a nice vibe as the sun began setting on the fest.