Cindy Herron, from left, Terry Ellis and Rhona Bennett, of En Vogue, perform at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 20, 2018, in Las Vegas. (Photo by Chris Pizz …

Cindy Herron, from left, Terry Ellis and Rhona Bennett, of En Vogue, perform at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 20, 2018, in Las Vegas. (Photo by Chris Pizz ...

Cindy Herron, from left, Terry Ellis and Rhona Bennett, of En Vogue, perform at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 20, 2018, in Las Vegas. (Photo by Chris Pizzello/Invision/AP)