Pentatonix Covers “Problem” by Ariana Grande

Photo: Getty

The Internet's favorite a cappella group is back with another stellar pop cover. The group -- famous for winning NBC's The Sing-Off -- took on Ariana Grande and Iggy Azalea's "Problem" for their latest EP, PTX Vol III.

While there's no funky sax like the original, the group keeps the party going by keeping Iggy's rap intact on their near-flawless rendition of the song.

In addition to their upcoming EP, the group recently filmed scenes for Pitch Perfect 2. The group will appear as Canadian rivals to the Barden Bellas in the sequel to the hit film about making music with their mouths.

In the meantime, watch their insane covers of Daft Punk and Beyonce.