The pop extravaganza will take place on July 22 in Weston Super Mare, Somerset.
Over 20 acts are still to be announced. The event will be televised live on Channel 4.
Presenter June Sarpong said: "I’ll be packing up my favourite summery dresses, biggest shades and looking forward to heading down to Weston. Its always a fun day with an amazing crowd - bring on the summer!"
Tickets for the event go on sale tomorrow. More information can be found at www.channel4.com/t4onthebeach.