Music's biggest stars headed to Sin City for the 2013 Billboard Music Awards, and we couldn't help but notice all of the exposed skin on the red carpet! Selena Gomez went for daring illusion slits, Taylor Swift showed off some serious leg, while Jennifer Lopez went for one of her signatures: a plunging neckline. Plus, Miley Cyrus took a fashion risk in a jumpsuit, and it totally paid off. All this and more in today's Fashion Flash. On Allison: Equipment top, IRO blouse, Express skirt.