2. Old-Hollywood glamour
It's Music's Biggest Night®, so it's no wonder artists aren't afraid of going all out with the glam. Incorporating a throwback allure were "Love Like This" singer Faith Evans in a fur-accented outfit, pop princess Ariana Grande in a form-fitting red number, and country starlet Carrie Underwood in a ruched gown with a sweetheart neck.
Photo: © AdMedia/Corbis (Faith Evans), © Lisa O'Connor/ZUMA Press/Corbis (Ariana Grande)