ACM Presents Girls' Night Out: Superstar Women Of Country - Backstage And Audience [Getty Images]

LAS VEGAS, NV - APRIL 04: Honorees Carrie Underwood and Miranda Lambert pose backstage during ACM Presents: Girls' Night Out: Superstar Women of Country concert held at the MGM Grand Garden Arena on April 4, 2011 in Las Vegas, Nevada. (Photo by Christopher Polk/ACMA2011/Getty Images for ACM)

Getty Images Entertainment Christopher Polk/ACMA2011