Unidentified Flashing Object Spotted at Premiere

7/9/2008 10:57 AM PDT BY TMZ STAFF
Despite being unknown, someone called Jo Champa has never been more overexposed.
Jo Champa
Champa -- who once starred in an episode of "JAG" -- borrowed one of Elvira's gowns and revealed her credits at a premiere last night.

Those who can't act, flash!