Selena Gomez
This may have been the Teen Choice Awards, but Selena Gomez showed us just how grown-up she is in this Saint Laurent ensemble. Sleek, tailored, and beyond chic, this all-black tuxedo-style jumpsuit is reminiscent of YSL's signature "Le Smoking" look, inspired by the boys. Paired perfectly with a slick ponytail, the outfit was the epitome of understated elegance, although Selena did allow for her metallic accessories to make their own statement.