Gwen Stefani of No Doubt performs on the main stage during the Rock in Rio music festival in Las Vegas in the early hours of Saturday, May 9, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow …

Gwen Stefani of No Doubt performs on the main stage during the Rock in Rio music festival in Las Vegas in the early hours of Saturday, May 9, 2015. (Chase Stevens/Las Vegas Review-Journal) Follow Chase Stevens on Twitter @csstevensphoto