Death In Vegas, Lamb, FC Kahuna, Buck 65, Blackalicious, Blak Twang, Pepe Deluxe, Scissor Sisters and Audio Bullys have been added to the already massive Carling Weekend: Reading And Leeds line-ups.
Stage details and running orders for the new additions are yet to be announced.
The highlights of the festival include performances from The Polyphonic Spree, Blur, The White Stripes, Metallica and Yeah Yeah Yeahs.