LOS ANGELES, CA - DECEMBER 12: Musicians Josh Dun (L) and Tyler Joseph of Twenty One Pilots perform onstage during 106.7 KROQ
Kevin Winter/Getty Images for CBS Radio

Scores of artists have paid their respects to singer Christina Grimmie, who was shot and killed after a concert Friday night in Orlando. Many eulogized the 22-year-old performer on social media, as the #RIPChristina hashtag became the number one worldwide Twitter-trend on Saturday. 

Twenty One Pilots delivered their own tribute on Saturday night in a performance in Camden, New Jersey. The band played their song "Doubt," which made sense, given that Grimmie had covered it in the past. Watch video of the performance below.  

Twenty One Pilots chose to play "Doubt" after a Twitter campaign from fans requested the band honor the slain singer with the song in concert.  

Many other artists have expressed dismay and grief after Grimmie was tragically shot and killed. Selena Gomez yesterday canceled a meet-and-greet with fans scheduled to take place after a concert in Miami, writing on Twitter: "My heart is absolutely broken." Grimmie was killed by Kevin James Loibl, 27, of St. Petersburg, Florida, Orlando police confirmed on Saturday. Loibl was pronounced dead at the scene after killing himself.