Bruno Mars was in perfect form at the iHeartRadio music festival Saturday night at the MGM Grand Garden Arena, wowing with his slick moves and energetic vibe. It is no wonder that the pop crooner will be performing at the Super Bowl halftime show.

Justin Timberlake was also a fan favorite. The pop star closed the five-hour plus concert, singing hits like "Mirror" and "SexyBack." Paul McCartney kicked off the show, playing a bunch of new songs from his upcoming album. And R&B singer Miguel and rapper Drake also earned cheers.

While men dominated Saturday, Ke$ha gave an impressive performance of her hits. She even brought out Joan Jett and the two sang "Bad Reputation." But Miley Cyrus was building on her bad reputation: She caused a stir when she entered the stage in a fishnet dress and tape covering her nipples.

Maroon 5, Tim McGraw and Phoenix also performed on the second night of the two-day festival.