Lady Gaga, Nicki Minaj, J. Lo, Usher among bevy of A-listers to turn out for the iHeartRadio music festival in Las Vegas
Fergie, Carrie Underwood, Jay-Z, Alicia Keys also burn up the stage
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Lady Gaga performs at the iHeartRadio music festival in Las Vegas
Lady Gaga was among a huge lineup of music superstars to perform at the festival, organized by the iHeartRadio social networking platform. The show took place at the MGM Grand Garden Arena in Las Vegas, Nevada.