'Men in Black 3' -- Topless Invader Micaela Schaefer in Germany

The chick featured in this photo is NOT in "Men In Black 3" ... but she showed up to the premiere in Germany anyway ... and ABSOLUTELY NOBODY complained.

Sporting a necklace ... and some garbage bag strips attached to other garbage bag strips ... German bikini model Micaela Schaefer walked the same red carpet as Will Smith and Josh Brolin on Monday.