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LAS VEGAS, NV - MAY 22: Singer Gwen Stefani performs onstage during the 2016 Billboard Music Awards at T-Mobile Arena on May 22, 2016 in Las Vegas, Nevada. (Photo by Jeff Kravitz/BBMA2016/FilmMagic)

LAS VEGAS, NV - MAY 22:  Singer Gwen Stefani performs onstage during the 2016 Billboard Music Awards at T-Mobile Arena on May 22, 2016 in Las Vegas, Nevada.  (Photo by Jeff Kravitz/BBMA2016/FilmMagic)