JUST ADDED: 5 Seconds of Summer will be rocking the stage at this year's iHeartRadio Music Festival Village in Las Vegas! The band sat down with Ryan Seacrest to break the news. Click here to buy your tickets now, before they sell out!
Coming all the way from Norway, the hilarious duo Ylvis showed everyone at the iHeartRadio Music Festival what the fox say when they performed their viral hit "The Fox" - in full fox attire!!
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