Katy Perry & Emma Roberts: Maroon 5 Halloween Party!

By Kim Brown |

Nov 1, 2012

Katy Perry goes all out as Jane Lane from Daria at Maroon 5‘s Halloween Party held at the Hollywood Forever Cemetery on Wednesday (October 31).

The 28-year-old singer was joined at the bash by Emma Roberts, Rose McGowan, Chris Evans, Aziz Ansari, and Adrian Grenier, among others.

Emma dressed as a cat, and posed for a picture next to someone in a Scream mask (Emma starred in Scream 4). Rose looked pretty as a Snow Queen. Chris rocked a Hawaiian shirt, while Aziz chose a Thomas the Tank Engine get up. Adrian looked tough as a ninja!

15+ pictures inside of Katy Perry and more at the Hollywood Forever Cemetery Halloween Party…