Chris Willman Music WriterTaylor Swift will perform “Betty” on the Academy of Country Music Awards telecast Wednesday, her first time performing on any country awards show in seven years.Swift will sing from the stage of the Grand Ole Opry House, one of three iconic Nashville venues (the other two being the Ryman and Bluebird Cafe) being used as a home base for the ACMs this year.Swift made the announcement on her social media accounts concurrent with a promotional spot that appeared on ACMs