Pop superstars Mika and Calvin Harris have been added to the bill for T4 on the Beach as part of the second line-up announcement for the Weston-super-Mare event.
McFly and Maroon 5 also join the line-up which already boasts Akon, Natasha Bedingfield and Just Jack.
In the spirit of the beach event, all of the acts will play two or three of their hit tracks and then quickly disappear before the next artist.
T4 presenters June Sarpong, Steve Jones and Miquita Oliver will be on hand to host the summer party, which regulalry attracts about 30,000 revellers to the seaside town.
Jones said: "I can't wait to get to Weston-super-Mare again. The last few years have been loads of fun.
As for this year, I personally guarantee it will be the best yet - if not, you and the family can lynch me. See you there."
Gates open at 10:00 BST on Sunday July 22nd and the first acts will be on stage at noon. McFly, who will be playing as part of the main acts line-up, will be celebrating their third T4 on the Beach show.
This year also sees the addition of the Aygo Disco, which gives members of the audience the chance to DJ from their iPod in front of the crowd.