Dolly Parton's representative has dismissed speculation the country queen mimed her way through a hit-packed set at Britain's Glastonbury Festival on Sunday (29Jun14). The veteran superstar made her debut at the iconic U.K. music event by gracing the main Pyramid Stage on the final day in front of a huge crowd. Thousands of fans sang along as she ploughed through hits such as Jolene, Islands in the Stream and 9 to 5, but many viewers who were watching the footage on TV at home took to Twitter.com to accuse Parton of lip-syncing. However, her spokesperson has now quietened critics, saying, "No, she sings live. Some people don't know an amazing singer when they hear one." Despite the controversy, Parton's set has been hailed the highlight of the weekend (27-29Jun14). Other performers included Arcade Fire, Metallica and Kasabian, who closed the festival with a storming set on Sunday night.