Nicki Minaj accepts the award for top rap artist at the Billboard Music Awards

Nicki Minaj accepts the award for top rap artist at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)

Shania Twain presents the award for top rap artist to Nicki Minaj at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 19, 2013 in Las Vegas. (Photo by Chris Pizzello/Invision/AP)