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LAS VEGAS, NV - MAY 21: Singer Gwen Stefani speaks onstage during the 2017 Billboard Music Awards at T-Mobile Arena on May 21, 2017 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images)

LAS VEGAS, NV - MAY 21:  Singer Gwen Stefani speaks onstage during the 2017 Billboard Music Awards at T-Mobile Arena on May 21, 2017 in Las Vegas, Nevada.  (Photo by Ethan Miller/Getty Images)