Plan B, Ou Est Le Swimming Pool and Xavier Rudd are amongst the fresh additions for the Relentless Boardmasters Festival.
Also joining the Cornish party are Tinie Tempah, Alan Pownall, Fenech Soler and Matthew P.
Already confirmed are Friday night's joint headliners Seasick Steve and Newton Faulkner, Saturday's headline act Leftfield, plus Example, French Horn Rebellion and Chase & Status.
Fusing surfing, skating and BMX with live music, Relentless Boardmasters Festival takes place from August 4th to the 8th 2010 at Watergate Bay, Cornwall.
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