Kate Nash, Dizzee Rascal and The Maccabees are among the latest acts confirmed for T4 On The Beach.
Other acts just added are Hadouken!, Reverend And The Makers and Super Furry Animals.
The Weston-Super-Mare beach party takes place on Sunday, 22 July.
Previously confirmed acts include Kaiser Chiefs, Akon, Natasha Bedingfield, Girls Aloud and McFly.
The event is sold out but you can watch it from the comfort of your home on Channel 4 live throughout the day.