LONDON--The 3rd annual Party in the Park 2000 festival--which will feature Christina Aguilera [ tickets ]'s first U.K. appearance--set a world record on Thursday (5/25) by selling out all of its 100,000 tickets in less than seven hours, a new single-day concert sales record, according to the event's publicist.

So far, this year's line-up also includes Destiny's Child [ tickets ], Craig David [ tickets ], Savage Garden [ tickets ], Travis [ tickets ], All Saints, Gabrielle, Mel C, Westlife, the Corrs, Texas and Ronan Keating.

The pop music event will be held in London's Hyde Park on July 9. All proceeds from the event will benefit the Prince's Trust, Prince Charles' charity for young adults.