Primal Scream + Kelis + Diddy Dirty Money + Jessie J + Wretch 32 + Professor Gre

Bobbie Gillespie's epic psych garage-rockers cum baggy house exponents cum Stones-y recidivists cum grubby electro dudes top an already impressive bill, alongside the lascivious, Rihanna-styled US R&B/soul-pop with attitude of 23-year-old, Essex-born singer-songwriter JJ, and 22-year-old Camden chanteuse Doolittle at this Orange Rockcorps show. This is a gig with an admirable twist – entry is gained only by devoting four hours to hard (well, maybe) labour in your chosen community project. One ticket per person. For more info head to www.orangerockcorps.co.uk.