BEST: Hailee Steinfeld
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Pretty in purple! The "Most Girls" singer added a pop of color to her look with these vibrant boots from Alexandre Vauthier. Her white dress was created by the same designer, and featured a thigh-high slit that was a risqué move for the 21-year-old fashionista. She topped off the look with gorgeous, light waves and a pretty turquoise smokey eye.

Photo: Lester Cohen/Getty Images for NARAS