Katherine Heigl is Hot in Hollywood

Katherine Heigl lends her support at the 2008 “Hot In Hollywood” event at The Avalon on Saturday in Hollywood, Calif.

Of course, her Grey’s Anatomy costar T.R. Knight and his boyfriend Mark Cornelsen were also present.

Hot In Hollywood is a celebration benefiting charities dedicated to the education, prevention, testing and treatment of HIV/AIDS. In just three years, this celebrity fundraiser has become quite the event. Proceeds from Hot In Hollywood benefit AHF’s (AIDS Healthcare Foundation) HIV Mobile Prevention and Testing Unit, a customized recreational vehicle that travels throughout Los Angeles County to reach underserved populations with HIV/AIDS education, testing, counseling, and treatment referral services.

10+ pictures inside of Katherine Heigl looking hot in Hollywood…