Attending the Victoria's Secret Fashion Show — and not walking the runway — raises an important question: what's the dress code exactly? In a word: sexy. That much is a given, and the stars showing up on the pink carpet are the proof. From Lady Gaga's arrival in a sheer gown to Kate Moss's little sis, Lottie, it's promising to be a pretty glamorous night in Paris. Read on to see who wore what before the Angels take the catwalk.