Winehouse cancelled her performance last year

The troubled star pulled out of last year's festival at Balado, Kinross-shire, due to "exhaustion".

Winehouse will play the main stage on the Sunday of Scotland's biggest weekend music festival, which runs from Friday 11-13 July.

This year's line-up includes REM, The Verve, The Fratellis and Primal Scream.

Organisers said the Back to Black star was keen to return to Scotland after enjoying the reception when she played two shows at the Glasgow Barrowlands venue last year.

Doctor's advice

A T in the Park spokeswoman said: "She is honouring her commitment to the festival last year when she could not play.

"She is a phenomenal talent and it has always been her intention to come and play at T after what happened last year.

"She felt really bad about pulling out last year. She got such a great reception at the Barrowlands, and she's said she wishes she could play Scotland every night."

Last year the troubled singer cancelled her appearance hours before she was due on stage.

She blamed exhaustion and said her doctor had advised her not to perform.

Other acts set to play at this year's event, which is expected to draw crowds of up to 80,000 people are Kings of Leon, Kaiser Chiefs, Stereophonics and KT Tunstall.