Las VegasiHeart Radio Festival brought some of music biggest stars to Sin City on Friday night. Among the top performers were Rihanna, Green Day, Usher, Lil Wayne, No Doubt, Bon Jovi, Jason Aldean and more. Even Korean sensation Psy brought "Gangnam Style" to the event. 

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Dave Lewis has been a Los Angeles-based entertainment writer and editor for nearly ten years. Originally hailing from Minneapolis, he moved to L.A. in 1996 to attend USC, before working for various periodicals and web sites including a lengthy stint at He joined the HitFix staff in 2011.