'This Is Love' music mogul Will.i.Am has revealed that teen sensation Justin Bieber wrote a song for his girlfriend, Selena Gomez.

Speaking to Canada’s New Music Live, Will.i.Am explained how he found himself on the same flight as the 'Boyfriend' heartthrob, who treated him to a sneak preview of the track:

"[Bieber] taps me on the shoulder... ‘Yo, I want to show you this song I produced and wrote. I'm really excited about it because it's one of the first songs I produced by myself.'"

He admitted that the cut was impressive, adding: "The song was dope. He was like, 'Yeah, I wrote it for Selena.'"

"It's great.. And it was really awesome. It was, like, really, really dope. I think that guy is gonna be around for a really, really long time.”