Gwyneth Paltrow, your goop is showing! Yes, People mag's Most Beautiful Woman in the world, and that's her side butt. So much for just being a jeans and tee-shirt kind of mom. The 40-year-old star hit the red carpet at the L.A. premiere of Iron Man 3 in this Antonio Berardi gown, with sheer paneling on the sides and white silhouettes on the front and back. Obviously the design makes wearing a bra and undies impossible. Not that she cared to wear them anyway.