LAS VEGAS, NV - MAY 17: Singer/actress Jennifer Lopez introduces a performance by Chris Brown and Pitbull during the 2015 Billboard Music Awards at MGM Grand Garden Arena on May 17, 2015 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images)

LAS VEGAS, NV - MAY 17:  Singer/actress Jennifer Lopez introduces a performance by Chris Brown and Pitbull during the 2015 Billboard Music Awards at MGM Grand Garden Arena on May 17, 2015 in Las Vegas, Nevada.  (Photo by Ethan Miller/Getty Images)