Posted on Sun Sep 25th, 2011 8:45am PDT
Bruno Mars started off the iHeartRadio Music Festival in Las Vegas at The Bank Nightclub and GOLD Boutique Nightclub & Lounge on Friday night!
The seven-time Grammy nominee performed at The Bank at Bellagio Resort & Casino, where the crowd, which included Glee's Naya Rivera and Darren Criss, sang along to "Grenade" and "The Lazy Song."
Mars and pals partied until 3 a.m., then headed back their VIP suite.
Also at the all-star fest were Nicki Minaj, Kenny Chesney, Jennifer Lopez, Usher, Steven Tyler, Randy Jackson (of American Idol), Nicole Scherzinger, Sting, David Guetta, Justin Timberlake, Natasha Bedingield, Jeff Beck, Rascal Flatts, Dr. Dre, The Black Eyed Peas, Coldplay, Jay-Z, Alicia Keys, Carrie Underwood, Ryan Seacrest, Lady Gaga and Kelly Clarkson.
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