LAS VEGAS, NV - MAY 17: Recording artists Taylor Swift (L) and Calvin Harris attend the 2015 Billboard Music Awards at MGM Grand Garden Arena on May 17, 2015 in Las Vegas, Nevada. (Photo by Kevin Winter/BMA2015/Getty Images for dcp)
LAS VEGAS, NV - MAY 17: Recording artists Taylor Swift (L) and Calvin Harris attend the 2015 Billboard Music Awards at MGM Grand Garden Arena on May 17, 2015 in Las Vegas, Nevada. (Photo by Kevin Winter/BMA2015/Getty Images for dcp)