Justin Bieber and Lady Gaga are aliens. According to a source, in the new upcoming Men in Black 3 movie both singing superstars will have a cameo in the film but it seems unlikely that you'll recognize them. Cause they'll be aliens.<br /><br />For more Hollywood news and gossip:<br />http://www.youtube.com/hollywoodbackstage<br /><br />Subscribe at: <br />http://www.youtube.com/subscription_center?add_user=HollywoodBackstage<br /><br />Like us on Facebook:<br />http://www.facebook.com/hollywoodbackstage<br /><br />Follow us on Twitter:<br />https://twitter.com/#!/HollywoodBstage
