LAS VEGAS, NV - APRIL 04: Honoree Wynonna Judd performs onstage 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 Ethan Miller/Getty Images
LAS VEGAS, NV - APRIL 04: Musicians Vince Gill and Carrie Underwood perform onstage 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 Ethan Miller/Getty Images
LAS VEGAS, NV - APRIL 04: Musicians Vince Gill and Carrie Underwood perform onstage 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 Ethan Miller/Getty Images
LAS VEGAS, NV - APRIL 04: Musician Vince Gill performs onstage 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 Ethan Miller/Getty Images LAS VEGAS, NV - APRIL 04: Musician Vince Gill performs onstage 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 Ethan Miller/Getty Images
LAS VEGAS, NV - APRIL 04: Musicians Susie Brown (L and Danelle Leverett of The JaneDear Girls perform onstage 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 Ethan Miller/Getty Images
LAS VEGAS, NV - APRIL 04: (L-R Musicians Neil Perry, Kimberly Perry, and Reid Perry of The Band Perry perform onstage 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 Ethan Miller/Getty Images
LAS VEGAS, NV - APRIL 04: Musician Sara Evans performs onstage 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 Ethan Miller/Getty Images
LAS VEGAS, NV - APRIL 04: Musician Sara Evans performs onstage 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 Ethan Miller/Getty Images
LAS VEGAS, NV - APRIL 04: Musician Sara Evans performs onstage 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 Ethan Miller/Getty Images
LAS VEGAS, NV - APRIL 04: Musicians Ronnie Dunn (L and Jennifer Nettles of Sugarland perform onstage 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 Ethan Miller/Getty Images
LAS VEGAS, NV - APRIL 04: Musicians Ronnie Dunn (L and Jennifer Nettles of Sugarland perform onstage 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 Ethan Miller/Getty Images
LAS VEGAS, NV - APRIL 04: Musician Ronnie Dunn performs onstage 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 Ethan Miller/Getty Images
