CAN WE GET A 'YEE-HAW': Gather 'round all ye outlaws and cowgirls. The 49th annual ACM Awards, co-hosted again by Blake Shelton and Luke Bryan, are coming at ya straight from Vegas on CBS tonight at 8/7c. The event includes performances by Jason Aldean, hosts Bryan and Shelton, Miranda Lambert, Keith Urban, Tim McGraw, Sheryl Crow, Rascal Flatts, Shakira, Eric Church, Florida Georgia Line, Stevie Nicks, Lady Antebellum, The Band Perry and more. Lambert and McGraw top the nominees list, with seven apiece You can catch the preceding red carpet footage at 3:30PT. Click here for more info about the show, and stay tuned for our recap story. (4/6p)