The women of country music are being honored tonight on CBSCarrie Underwood, Wynonna and Naomi Judd, Jennifer Nettles, Martina McBride, Loretta Lynn, Miranda Lambert and Reba are all part of "Girls Night Out: Superstar Women of Country."   The concert was taped after the ACM awards in Las Vegas last month.  The ladies will perform one song and some will even team up with the men of country music.  Vince Gill joins Carrie Underwood for a duet of her hit "Cowboy Cassavona."   Other duets include Ronnie Dunn and Jennifer Nettles, Reba and Rascal Flatts and a special tribute from Jason Aldean and Blake Shelton.  

The girls got together to discuss the pressures of being a woman

Get a glimpse behind the scenes with Sara Evans and set your Tivo for 9 tonight to catch Girls Night Out on CBS.