She is a two-time winner of theAcademy of Country Music's highly-coveted Entertainer Of The Year award.And for the first time in seven-years, Taylor Swiftreturned to the ACM stage to deliver the world premiere performance of her hit song Betty at theGrand Ole Opry House.The 30-year-old singer-songwriter wielded a black acoustic guitar and remained seated on a stool as she effortlessly performed the emotionally-charged track.