Britney Spears and Ariana Grande perform onstage at the 2016 iHeartRadio Music Festival at T-Mobile Arena on September 24, 2016 in Las Vegas

iHeartRadio Music Festival

All of the hottest moments from the event!

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Britney Spears and Ariana Grande perform onstage at the 2016 iHeartRadio Music Festival at T-Mobile Arena on September 24, 2016 in Las Vegas

iHeartRadio Music Festival

All of the hottest moments from the event!

Top photos