One of the fun things about the 'Men In Black' movies is seeing which celebrities will be 'outed' as aliens. Well, sorry...I'm about to spoil that for you.

Directory Barry Sonnenfeld says that Lady Gaga, Justin Bieber and Tim Burton will be aliens in 'Men In Black 3'.

That doesn't mean they'll make cameos. Their faces will just be shown on the alien surveillance board at Men In Black headquarters.

Sonnenfeld says, "The challenge is you have to get permission from these celebrities...and you don't want to go with people that are either a flash in the pan, or political, or people that then in 10 years no one will know who you're talking about."

'Men In Black 3' hits theaters on May 25th.

(Chicago Tribune)

Here's the trailer: