Dizzee Rascal, The Maccabees and Remi Nicole have also been added to the line-up of the pop extravaganza, which will take place on July 22 in Weston Super Mare, Somerset.
They join Girls Aloud, Kaiser Chiefs and Mutya Buena, who were added to the line-up last month. Mika, McFly and Maroon 5 were added to the bill in May.
The event, which will be hosted by June Sarpong, Miquita Oliver and Steve Jones, will be televised live on Channel 4.
