Zac Efron Rocks Short Shorts at Star Studded Halloween Bash! (PHOTOS)

Amanda Hasaka / November 1, 2011

Got to love a guy who isn’t afraid to get into the Halloween spirit!

Zac Efron attended a Halloween bash on Monday night and put on his finest Reno 911, Lt. Dangle shorts, and natch, rocked an amazing mustache.

So, who were some other celebs who hit up the party?

Miley Cyrus, Emma Roberts as well as sisters Aly and AJ Michalka all partied hard for the scariest day of the year.

Check out the rest of the fun photos in the gallery!