Pentatonix perform a mash-up of some of this years biggest hits

To celebrate the release of their new album, Pentatonix have released an amazing mash up of some of this years biggest hits!

The team cover, Bruno Mars, Charlie Puth, Camila Cabello, Ed Sheeran and others all in on video.

The video has been viewed over 1 million times online since it was uploaded last week.