Shimmery metallic dresses dominated the red carpet at the American Music Awards last night. Taylor Swift, who took home three awards — including Artist of the Year — wore a beautiful sparkly Reem Acra gown paired with bright emerald earrings. Selena Gomez, who posed with boyfriend Justin Bieber on the carpet, went for a sexy, silk champagne dress by Giorgio Armani. Watch to see our other favorite outfits from the American Music Awards. On Allison: StyleMint top, J Brand jeans.