Sarah Palin Wannabes Expose Themselves

5/13/2010 8:45 AM PDT

Sarah Palin Wannabes Expose Themselves

Sarah Palin was a featured speaker at the Rosemont Theater in Chi-town last night -- but the real tea party was blocks away, at a Palin-alike stripping competition!

It all went down at Chicago's Admiral Theatre -- where a 21-year-old Palin doppelganger named "Bia" (above) won $2,500 after proving she has nothing to hide on some very hot button issues.

According to the organizers, a portion of the the proceeds went to a "legitimate tea party organization," and while Sarah was invited to judge ... we're told she never got back to them on the offer.

Wonder why?