From Hollywood.com Staff

Katy Perry had no shortage of big celebrity names at the premiere of her 3D film Katy Perry: Part of Me at Grauman's Chinese Theatre in LA on Tuesday, June 26.

Fellow pop stars Justin Bieber, Selena Gomez, Carly Rae Jepson and Victoria Justice all came out for the singer's big night (as well as family members like her grandmother and her preacher parents, Keith and Mary).

But one face who she probably never wanted to see was not too far away. Her ex-husband Russell Brand was partying just 10 minutes away at the FX Summer Comedies Party at Lure nightclub.

Part of Me, which delves into Katy and Russell's painful divorce, opens in theaters on July 5.

More:

Watch the Katy 'Perry: Part of Me' Trailer: Boobs, Fireworks and... Headgear?

Listen To Katy Perry's New Single 'Part of Me'

Why Katy Perry Turned Down a Role in 'The Help'

[Photo credit: Wenn]