Katy Perry & Orlando Bloom Arrive on Motorcycle for Jennifer Aniston's Birthday Party

Katy Perry holds on to boyfriend Orlando Bloom while arriving via motorcycle at the Sunset Tower Hotel on Saturday night (February 9) in Los Angeles.

The hot couple stepped out that evening to attend Jennifer Aniston‘s star-studded 50th birthday. If you don’t believe us when we say star-studded, go check out the guest list.

Katy‘s ex-boyfriend John Mayer, who also dated Jen back in the day, was reportedly one of the stars in attendance.

The night before, Katy and Orlando were among the stars who attended the MusiCares gala ahead of the Grammys.

20+ pictures inside of Katy Perry and Orlando Bloom at the party…