LAS VEGAS, NV - MAY 19: Singer Justin Bieber performs during the 2013 Billboard Music Awards at the MGM Grand Garden Arena on May 19, 2013 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images)
LAS VEGAS, NV - MAY 19: Singer Justin Bieber performs during the 2013 Billboard Music Awards at the MGM Grand Garden Arena on May 19, 2013 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images)