One of the predecessors to modern day boy bands, the five Mormon brothers boasted vocal and instrumental talent, which wowed TV producers and landed them gigs around the country. Alan, Merrill, Donny, Jay and Wayne Osmond notched hits both collectively and as solo acts, which also helped pave the way for their younger siblings Marie and Jimmy to become stars too.

The defining band for modern-pop music. While it's tough to completely label The Beatles a "boy band" as we use the term today, the group's huge appeal and the subsequent pandemonium they created set the standard for any following boy band mania.

Originally put together as a band for a TV sitcom, The Monkees evolved into an actual music group. Even after their show was cancelled, they continued to record together.

Another early boy band created from family members, the outfit was one of the first black groups to snag major crossover appeal. It was also, of course, the launching pad for none other than the King of Pop himself, Michael Jackson.

One of the biggest Latin boy bands in history, the Puerto Rican outfit had a rotating lineup that was the first major gig for musicians like Ricky Martin and Draco Rosa.

The R&B-pop group is credited with being the progenitors of the '80s and '90s boy bands. Plus the band gave members Bobby Brown, Johnny Gill and Ralph Tresvant the launchpad for successful solo projects.

Breaking out as teen idols in the late '80s/early '90s, NKOTB went on to sell tens of millions of records around the world. They remain a beloved boy band today, even though they're long past boyhood, with successful touring stints and side projects.

The '90s R&B vocal extraordinaires, Boyz II Men won international success with their heartfelt ballads that showed their knack for luscious, a cappella harmonies. Their collaboration with Mariah Carey, "One Sweet Day," still holds the record for longest song at No. 1 ever at 16 weeks.

The most successful boy band in UK chart history, the pop group was a bit like the UK's answer to New Kids on the Block. The quintet was wildly popular, earning 11 No. 1 singles in England alone and scoring hit singles and albums around Europe. Three members are currently keeping the band alive.

The critics' favorite R&B-pop boy band scored a hit album, No. 1 single and GRAMMY award at their height in the mid-'90s. They still continue to perform today.

The brother trio of Isaac, Taylor and Zac Hanson broke out huge with their No. 1 debut single "MMMBop." They continue to perform today with a passionate fanbase still supporting the act.

The boy band that mixed R&B, soul and gospel, Dru Hill scored a dozen R&B hits in the mid-'90s to mid-'00s that also crossed over to the mainstream Top 40 charts. Plus they featured on Will Smith's No. 1 hit "Wild Wild West" in 1999.

The R&B outfit got their start in the mid-90s under Diddy's Bad Boy Records. They earned hits with their signature smooth delivery heard in their biggest chart hit "Peaches & Cream" and their Notorious B.I.G. collaboration "Only You."

BSB led the boy band mania that swept the world in the late '90s/early '00s. Their Millennium LP is one of the biggest selling albums ever, with nearly 14 million in sales. The guys are still going very strong too: Their 2013 album In a World Like This became their 10th Top 10 album, and the outfit just wrapped a massive co-tour with fellow classic boy band New Kids on the Block.

98 Degrees was one of the few boy bands of the 2000s-pop era that formed naturally and were later signed by a label. The guys released four albums together, earned four Top 5 singles and featured on the No. 1 single "Thank God I Found You," alongside Mariah Carey and Joe.

Rivals to the Backstreet Boys, 'N Sync was the other top boy band of the late '90s/early '00s. The launching pad for Justin Timberlake, the outfit still hold the record for biggest first-week album sales ever with No Strings Attached, which sold an amazing 2.42 million copies in one week.

With R&B's dominance in the '90s and early '00s, Jagged Edge was another boy band that owned the era. They earned a slew of hit albums and edgy, chart-topping tracks like "Where the Party At" and "Let's Get Married."

Five's "When the Lights Go Out" and "Slam Dunk (Da Funk)" were quintessential '90s pop hits, and the British boy band scored moderate crossover success in the U.S.

You remember the words: "New Kids on the Block had a bunch of hits / Chinese food makes me sick." That signature hit, along with the follow-up Top 10 hit "Girl on TV," were released on LFO's self-titled debut album, which went platinum. The trio disbanded in early 2002. While they reunited in 2009, member Rich Cronin unfortunately passed away a year later, and LFO announced they would permanently break up.

Boy bands were so friggen huge at the turn of the millennium that MTV even got behind a fake one. With a TV movie and spin-off series, this quintet was made up of actors (including Chris Farley's younger brother Kevin) who sang ridiculous, satirical songs. Their track "The Hardest Part of Breaking Up (Is Getting Back Your Stuff)" actually became a Hot 100 hit.

Created on the ABC reality show Making the Band, O-Town released two albums before a 2003 split. Their first, 2001's O-Town, went platinum and spawned the Top 10 singles "Liquid Dreams" and "All Or Nothing." The guys actually reunited (sans original member Ashley) this year, but the new LP wasn't able to make much of an impact.

You probably remember seeing Dream Street promoted on infomercials on TV because this band was everywhere for a short period. In their three-year career, the quintet released two albums, recorded on two soundtracks, dropped two DVDs and filmed a movie. The group broke up after the boys' parents took the band managers to court. Despite the quick fizzle, member Jesse McCartney is now a Hollywood fixture

One of the top R&B bands at the turn of the millennium, the quartet dropped two Top 10 albums and snagged a No. 1 single with "Bump Bump Bump" in 2002. The band also recorded most of the You Got Served soundtrack, released in late 2003, before breaking up in 2004.

One of K-pop's longest-running boy bands, with more than 10 years under their belts, TVXQ! has racked up incredible achievements. They've held massive concerts on both sides of the globe, earned legendary status in Korea and Japan and, at one point, held the Guinness World Record for largest official fan club, with 800,000 registered members in 2006. The band lost three members in 2010, but have moved on strong as a duo.

Kevin, Nick and Joe first rose to prominence as part of the Disney Channel movie Camp Rock, alongside fellow budding starlet Demi Lovato. The brother band developed a huge following and headlined multiple world tours. Inner tensions led them to go on hiatus in 2010 then break up officially in 2013, as they chose to put being brothers ahead of being a band that could potentially tear them apart.

One of the most recognized K-pop acts worldwide, the quintet are the only Korean boy band to break the coveted 100 million view mark on YouTube, with their 2012 single "Fantastic Baby." Since debuting in 2006, the outfit has found fans in everyone from Justin Bieber to Pharrell to Diplo. Their global popularity was solidified in 2012 when they beat out Britney Spears for the fan-voted Best Worldwide Act at the MTV EMAs.

The young, R&B/hip-hop quartet have a hugely dedicated fanbase, boast two Top 10 albums and even saw their 2011 single "Mrs. Right" hit the Hot 100 chart. Their latest album All Around the World came with an accompanying documentary film a la One Direction and Justin Bieber.

Like One Direction, JLS rose to fame on the UK's The X Factor. They came in second place (one spot better than 1D!) in the 2008 season. While an official U.S. debut didn't pan out, the quartet have five UK No. 1s to their name and are the biggest R&B male outfit from the country in recent years.

Created on their Nickelodeon show of the same name, Big Time Rush have leveraged their popular series into three full-length albums that have spawned multiple tours. Despite the TV show ending in mid-2013, the band has said there are plans for new music and tours with the guys signed to Columbia Records. It's a bit reminiscent of The Monkees' story (see slide 3).

Labeled as the "bad boy" answer to One Direction, the British quintet led the latest boy band mania craze with their hit "Glad You Came." The group is currently on hiatus.

One Direction currently lead the boy band pack. The British lads have broken records (including being the first band to have their first three records debut at No. 1 on the Billboard 200 albums chart) and headlined massive global tours. No doubt their upcoming album FOUR will further solidify their legacy and keep the boy band movement as healthy as it's ever been.