55th Academy of Country Music Awards will feature some incredible performers! CBS, Academy of Country Music and dick clark productions announced on Wednesday that musicians including Blake Shelton, Gwen Stefani, Carrie Underwood and Trisha Yearwood will take the stage for this year's show.Shelton and Stefani are set perform their single, «Happy Anywhere,» while Underwood will honor trailblazing female Opry members by performing a medley of songs by Patsy Cline, Loretta Lynn, Barbara Mandrell,