"This is it...its live and officially launched to the world... #thatPOWER," will.i.am, who turns 38 today, posted.
He followed it up with a pic of the song's cover art, tweeting, "The art to my next single #thatPOWER," which Bieber retweeted.
"The collaboration on this song is a doozy," will.i.am told Capitol FM of the song, which will be on his next album #willpower, out on Apr. 9. "It's a spectacular one."
Check out will.i.am introducing the song below and hear the full song on YouTube.