Taylor Swift guests on Justin Bieber's "Believe"

The Biebs revealed to UK radio station Capital FM that his third album will feature a collaboration with Swift and said that it will have a country flavour.

"It doesn't stay in a box," he explained. "Everything is so different and that's why I'm so happy with this album."

Swift joins a group of A-listers who are lending their talents to the album, including Drake, Usher, Kanye West and Diplo.