Coldplay + Katy Perry + Justin Bieber + Jessie J + Usher + The Wanted + Ed Sheer

There's a stonking line-up of pop juggernauts at this Capital FM summer shindig, topped off by the galaxy-conquering pop-rockers Coldplay. Baby-faced Canadian tween heartthrob Bieber brings up the rear alongside the poplicious Ms Perry, electro/'urban' Essex popstrel JJ, smooth crooner Usher and his loverman R&B and loads more chart-toppers and their egos than there's really room for in this stadium.