Rihanna Smacks Michael Cera In 'This Is The End' Red Band Trailer (VIDEO)

Half of Hollywood came out to play themselves in Seth Rogen's apocalyptic comedy "This Is The End,"and if there's one thing we learned from the film's red band trailer it's not to mess with Rihanna.

In the trailer, a star-studded party at James Franco's house -- filled with famous guests including Jonah Hill, Danny McBride, Craig Robinson, Jay Baruchel, Kevin Hart, Michael Cera, Mindy Kaling, Aziz Ansari, Jason Segel and many more -- is interrupted by some sort of cataclysmic world-ending event, but not before we get to witness Rihanna losing it on Cera.

Before the mayhem starts, a coked-out Cera makes the mistake of greeting Rihanna by smacking her on the butt. She returns the favor by smacking him hard in the face while yelling, "Don't f--king touch my bumper, b-tch."

Cera, who (spoiler) is later seen enduring a horrible, bloody death, at least gets some some kind words from Kaling, who remarks, "Oh my god, If I don't f--k Michael Cera tonight, I'm going to blow my brains out."

"This Is The End" is out in theaters on June 14.