Men in Black III director Barry Sonnenfeld recently confirmed that both pop stars will have small roles in the upcoming summer blockbuster.
"In this [installment] there are a few people that you'll see up on the surveillance board, including Lady Gaga, Tim Burton, who probably knows more about aliens than I do, and let's see who else... Justin Bieber," Sonnenfeld said. "The challenge is getting celebrities that are famous, will give you permission and won't be like 'Who's that guy?' in 10 years."
Of course, J.B. and Gaga aren't the first pop icons to participate in the Men in Black films. In 2002's Men in Black II, Michael Jackson played Agent M.