WATCH: Pentatonix Covers Ariana Grande And It's Awesome
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!
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Pentatonix takes on Ariana Grande's smash hit, "Problem" for their latest YouTube cover, and it ROCKS!
Check it out below.