graced the Ford Center stage in Frisco, Texas, the “No Fences” crooner labeled Parton as the “G.O.A.T” — meaning she’s the “greatest of all time.” The “9 to 5” singer then strolled onto the platform while pulling a cart with an actual goat sitting in it. “I’ve got your G.O.A.T. right here!” she laughed as she took her place next to Brooks.Parton then couldn’t help but gush over her co-emcee’s musical gifts, saying: “He changed the name of country music forever.”“In a flash, he became one of the biggest stars of all time,” she said.Then the Tennessee native revealed why she believes that Brooks called her the “G.O.A.T.”“I think it stands for ‘Garth organized a threesome!’” she joked on air.Parton added that she is the “Not Counting On You” musician’s “hall pass” — meaning that she is his one chance to have an affair without any repercussions from his wife.Yearwood and Brooks have been married since 2005, while Parton wedded Carl Thomas Dean in 1996.Parton also sang a beautiful tribute to the late Loretta Lynn and Naomi Judd at the ceremony.