Since today is will.i.am's birthday he thought what better way to celebrate that with a new song with the Biebs? "#ThatPower" is another up-tempo one, with everything you would expect from will.i.am & something a little more risky for Justin Bieber. 

The song will be featured on will.i.am's next album titles #willpower set to release next month!

PS. You think will.i.am likes #hashtags much?