Backstage at iHeartRadio: One Direction's Liam Payne on How He Injured His Hand

"Extra's" Charissa Thompson was backstage in the portrait room at the iHeartRadio music festival in Las Vegas catching up with One Direction's Liam Payne, Louis Tomlinson and Zayn Malik. Liam chatted about how he injured his hand and the the three members chatted about the inspiration for the band's latest single.

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