You expect to see the fanciest, most luxurious brands on the red carpet: Chanel, Alexander McQueen, Valentino, and so on. But there seems to be a trend among Hollywood's brightest A-listers opting for affordable lines rather than designer—especially H&M. Jessica Chastain opted for the fast-fashion line at the Oscars and most recently? Sarah Jessica Parker at tonight's Met Gala. One of the first arrivals on the red carpet, SJP designed a one-shoulder embellished gown (very fitting with the China: Through The Looking Glass theme) in collaboration with H&M. She paired it with a statement-making Phillip Treacy headpiece and a Cindy Chao brooch.