He's baaack!

It's been two years since the release of My World 2.0, and now Justin Bieber is ready to share the first cut from his new album, Believe. The 18-year-old singer is unveiling his highly-anticipated single "Boyfriend" on March 26, and he's asking his fans to help choose the album cover art!

Votes will be tabulated via Twitter, using hashtags #JBboyfriend1 and #JBboyfriend2. The winning cover -- and additional exclusive content -- will be revealed Monday, March 19. Click here to vote.

"It's going to be really exciting," Bieber tells Us Weekly of his new album. "A lot of new stuff that people wouldn't expect!"

Bieber's My World 2.0 has been certified 2x platinum in his native Canada. He has sold more than 14 million albums worldwide.