Dolly Parton has denied miming during her popular set at this year’s Glastonbury Festival during which she sang hits such as Jolene and Blue Smoke.

The country music singer told The Sun: “My boobs are fake, my hair’s fake but what is real is my voice and my heart.”

Her debut appearance at the festival, popular with critics and the 100,000-strong crowd, drew criticism from some including newsreader Kay Burley who tweeted: “Oh, Dolly is miming. How disappointing.”

But not everyone agreed with the Sky News journalist about Sunday night’s performance on the Pyramid stage.

Broadcaster Stephen Fry defended the 68-year-old star on Twitter saying: “I think I know quite a lot about how TV is made. Why are people saying @DollyParton is miming? She’s fooling me…”

He followed up with a second tweet and said: “Believe me, that is not miming. If it appears not always to lip-sync that’s an HD live processor issue. You see it with news reporters.”

Dolly Parton’s spokesman also told the newspaper it was ridiculous to suggest the star was miming: "She’s been performing for more than 60 years - she doesn’t need to.

“This should not overshadow what was truly a great gig and accomplished performance. Dolly adored every single moment.”