Photos of 2012 Billboard Music Awards

<div class="meta image-caption"><div class="origin-logo origin-image "><span></span></div><span class="caption-text">Carrie Underwood arrives at the 2012 Billboard Awards at the MGM Grand on Sunday, May 20, 2012 in Las Vegas, NV.   (AP Photo&#47; John Shearer)</span></div>
May 21, 2012 6:20:18 AM PDT