Justin Bieber seems determined to prove that he’s a proper grown up pop star, so he’s enlisted some big names to work on his upcoming new album.

The 18-year-old tween heartthrob has collaborated with some of the biggest names in pop right now, including his pal Taylor Swift. Although the Biebs was reluctant to confirm if his new album would have a country feel,

“I even wrote a song with Taylor Swift,” Justin has told Capital FM. “So the whole album ranges differently."

“With my music it doesn't only stay in a box. Everything is so different and that's why I'm so happy with this album. Everything doesn't sound the same, everything's different and [after] each song you won't expect the next song to happen.”