Dare to bare! The actress rocked a sidebutt-baring dress to the Hollywood premiere of Iron Man 3 in April 2013, but had to ditch underwear to pull it off. "I kind of had a disaster," she later told Ellen DeGeneres. "I was doing a show and I changed there, and I went and I couldn't wear underwear. Let's just say, everyone went scrambling for a razor." She added to Jay Leno, "There was no underwear on in that dress. I put it on and it stayed in place, thank goodness."