Despite walking naked through the snows of northern Alberta, Rebecca Romijn-Stamos (who plays azure-skinned, clothing-averse Mystique in ''X2'') always maintained a stiff (frozen?) upper lip. ''They put down fake snow on top of the real snow -- basically potato flakes,'' the 30-year-old actress reports cheerfully. ''So between takes, there'd be three people -- including Ian McKellen -- scraping gummy, disgusting potato goo off my feet.'' Sounds lovely.
However, she did have reason to get the blues -- a five-hour makeup process. ''I would get very moody on the set,'' says Stamos. The trigger: gawking crew members and, well, just about anyone with functioning eyes. Luckily for her, Stamos soon forged solidarity with another person of color. ''I think for the Blue People -- Alan Cumming and myself -- we both felt like circus freaks.'' On a set full of mutants, that's saying something.