Miranda Lambert is already getting her groove back. The singer, who an**unced her divorce from Blake Shelton in July, looked gorgeous on Tuesday when she attended the ACM Ho**rs at the Ryman Auditorium in Nashville. Miranda, who sported an adorable pink dress, took the stage and belted out Loretta Lynn's classic song about divorce, "Rated X." Miranda also took time to pose for photos backstage with fellow country star Luke Bryan, who is close pals with Blake.