Robert Pattinson’s Crazy Night with Katy Perry, Justin Bieber & Selena Gomez

It was quite the evening in West Hollywood as Robert Pattinson partied with a trio of top pop music stars.

The “Twilight Saga: New Moon” hunk was spotted hopping out of Justin Bieber's custom $200,000 Mercedes Benz Minivan along with Selena Gomez, Katy Perry, and Justin, himself.

It was all part of the festivities surrounding the Los Angeles premiere of Katy’s new movie “Katy Perry: Part of Me” that happened earlier in the evening.

Rob and his friends showed up at Bootsy Bellows Night Club on Sunset Boulevard for their grand opening shindig.

During the commotion, one fan tweeted, "Justin Bieber, Selena Gomez, Katy Perry and Robert Pattison just jumped in Justin's van. Great seeing all of them together!"

Enjoy the pictures of Robert Pattinson out partying with Katy Perry, Selena Gomez and Justin Bieber in LA (June 26).