Our favorite country singin' ladies were honored at the ACM's 'Girls' Night Out: Superstar Women of Country' concert earlier this week, and if these pictures are any indication of the night's vibe, they had a blast. In order to celebrate the careers of honorees Reba McEntire, the Judds, Miranda Lambert, Martina McBride, and many others, country stars like Jason Aldean, Blake Shelton, Rascal Flatts, and Little Big Town showed up to take part in the event. In addition to these country singers, John Fogerty of the rock group Creedence Clearwater Revival performed a duet with Wynonna Judd. Take a look at these pictures from the ACM's 'Girls' Night Out' concert, and let us know which performance you're most looking forward to seeing when the two-hour special airs on CBS on April 22.