Listen To Pentatonix's A Cappella Cover Of Ariana Grande's "Problem"
To say that Pentatonix are keeping their pitch-perfect ears to the ground on what's hot this summer would be a huge understatement. They've already contributed a song to the Teenage Mutant Ninja Turtles soundtrack, and now they've taken on the season's biggest smash, Ariana Grande and Iggy Azalea's "Problem!"
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