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Jessie J and Eliza Doolittle will perform at this year's Orange RockCorps gig at Wembley Arena.

Organisers say more acts will be announced soon but rockers, Primal Scream, will be headlining on 12 July.

"We've got a phenomenal line-up at the Wembley gig," says one of the organisers, Andy Pearcey. "It will appeal to a variety of musical tastes."

In exchange for donating four hours charity work young people can earn themselves tickets to the concert.

This year there will be 150 volunteer projects across 32 London boroughs.