Katy Perry & Amber Heard: Johnny Wujek's Rollerskating Birthday Party!

Katy Perry comes out to celebrate the birthday of her stylist Johnny Wujek at Moonlight Rollerway rollerskating rink on Saturday (July 14) in Glendale, Calif.

The “Juan Sweet Skate Party” was also attended by Rachel Bilson (with boyfriend Hayden Christensen), Amber Heard, Zoe Saldana, Lindsay Lohan, Rose McGowan, Shannon Woodward, Skyler Shaye, Katy‘s musician brother David Hudson, and designer Jeremy Scott.

Looks like the party was a huge blast!! Guests, who were served drinks by Red Bull, dressed up in 90′s R&B costumes. Celebs were shuttled to and from the venue by Uber!

FYI: Amber is wearing Levi‘s shorts.

40+ pictures inside of Johnny Wujek‘s rollersting party…