iHeartRadio Music Festival performers

Flip through the photos to see who is performing at this year's iHeartRadio Music Festival in Las Vegas on Sept. 21 and 22.

  • Thirty Seconds to Mars Jamie McCarthy/Getty Images for MTV

  • Sir Elton John D Dipasupil/Getty Images

  • Fun. Dave Kotinsky/Getty Images

  • Miguel Ethan Miller/Getty Images

  • Phoenix Neilson Barnard/Getty Images for SiriusXM

  • Justin Timberlake Jason Kempin/Getty Images for Myspace

  • Muse Matt Kent/Getty Images

  • Zedd Stephen Lovekin/Getty Images

  • Maroon 5 Kevin Winter/Getty Images

  • Miley Cyrus Michael Kovac/Getty Images for City of Hope

  • Katy Perry Kevin Winter/Getty Images

  • Tim McGraw Rick Diamond/Getty Images

  • J. Cole Kevin Winter/Getty Images

  • Chris Brown Brendon Thorne/Getty Images

  • Bruno Mars Jamie McCarthy/Getty Images

  • Robin Thicke Jamie McCarthy/Getty Images

  • Sir Paul McCartney Larry Busacca/Getty Images For The Recording A

  • Tiesto Steven Lawton/Getty Images for ControlNY

  • Drake John Shearer/Getty Images for T-Mobile

  • Queen and Adam Lambert Ian Gavan/Getty Images