It's important to refrain from making any sudden movements when staring down a feral cat or standing in a canoe. But did you know the same rule applies when wearing a figure-hugging J. Mendel dress at the Bulgari "Decades or Glamour" party? PHOTO: Kate Hudson is All Legs at Bulgari Pre-Oscar Party On Wednesday night at the pre-Oscar shindig in West Hollywood, "Shameless" actress Emmy Rossum wore a dress so tight that she feared a wardrobe malfunction at almost any second. "I don't even want to sneeze," she told E! Online. "You might see my ovaries." PHOTOS: The Most Daring Red-Carpet Dresses of All Time When Rossum and E! correspondent Marc Malkin finished giggling, Malkin asked Rossum why she'd be nervous at all, seeing as she's gotten completely nude for Showtime's "Shameless." "Being naked in character is very easy, because it's just playing pretend," Rossum responded. "You're someone else. You don't feel like yourself. "In real life, I'm much more prudish." READ: Celebs Who Played Strippers on Film Rossum, 27, also claimed that she doesn't exercise before filming her racier scenes. "You gotta be in character," she told Malkin. "You can't think about cellulite." As for the actress' Oscar plans? She said she's going to "eat, watch it in my pajamas," and then go to the Vanity Fair party. READ: Duchess of Cambridge Makes Vanity Fair’s Best-Dressed List (Again) She's even got her party dress picked out … and for her sake, we can only hope that it's not a sneeze away from showing too much skin.