Music Justin Bieber Announces New Single 'Boyfriend' By Raphael Chestang 9:13 PM PST, February 29, 2012 Justin Bieber announced the release of his first single from his new album during an interview with Ellen DeGeneres set to air on Thursday. The single, called Boyfriend, was written by Bieber and Mike Posner and will drop March 26. Justin Bieber's Sweet Backstage SurpriseBieber explained the title, saying, "Basically I'm talking to this girl if I was your boyfriend I would never let you go." Bieber's Ellen appearance airs the same day as his 18th birthday, which wouldn't be complete without a surprise gift.Watch the video to see what a teen superstar gets for turning 18! Check your local listings to tune in to The Ellen DeGeneres Show weekdays.