Photos from Day 1 of the iHeart Radio Music Festival at MGM Grand Garden Arena

Robin Thicke at the iHeart Radio Music Festival

Robin Thicke at the iHeart Radio Music Festival

iHeart Radio Music Festival Day 1 at MGM Grand Garden Arena at MGM Grand Resort in Las Vegas, NV on September 20, 2013. Stars photographed: Robin Thicke, MUSE, Keith Urban, Tiesto, Ryan Seacrest, Katy Perry, FUN, TLC, The Summer Set, J. Cole, Adam Lambert, Gary Go, and Benny Benassi.

Photos by © Erik Kabik/ RETNA/ www.erikkabik.com

Katy Perry at the iHeart Radio Music Festival
Katy Perry at the iHeart Radio Music Festival

TLC at the iHeart Radio Music Festival
TLC at the iHeart Radio Music Festival

Adam Lambert at the iHeart Radio Music Festival
Adam Lambert at the iHeart Radio Music Festival

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