The singer will perform underneath headliner Eminem at the event, which takes place in Chelmsford and Staffordshire over the weekend of August 20-21.

Arctic Monkeys will also headline the festival, with Razorlight, Dizzee Rascal, Duran Duran, Chase And Status and The Script also on the bill.

Tinie Tempah, Jessie J, Glasvegas, The Courteeners, Bruno Mars, Kele, Ocean Colour Scene, The Wombats and Mark Ronson will also perform at the event.

Tickets go on sale on Friday (March 4) at 9am.

(by Jason Gregory)