The sexy star plays Channing Tatum's love interest in the saucy film about a troupe of male strippers, and in one particular sequence the 32 year old was expected to strip down for the cameras as her character stepped out of the shower.
But conservative Munn admits she was so self-conscious about baring her boobs, she wouldn't let her hunky co-stars Matt Bomer, Matthew McConaughey and Joe Manganiello stick around for moral support.
She tells New York Magazine, "My character was getting out of the shower and to keep it as realistic as possible I didn't wear a shirt in the shower. The day of the shoot, I locked it down. I only wanted the people who absolutely had to be there. I even cleared out video village (the playback room), which you'd normally forget about."
The guys were also asked to bare all in the movie, but the actress insists they were far more confident, adding, "When they'd (the producers) yell 'Cut!' I'd get my robe. The guys? They'd still be all a**es shaking, walking around. They didn't put their robes on ever."