Jessie J + The Wanted + Professor Green + Wretch 32

It's an early start for teens at this T4-promoted talent lineup, headlined by likeable electro/'urban' Essex popstrel Jessie J and also featuring five-strong Brit boyband The Wanted (imagine a male Saturdays). Plus former Mike Skinner protegé and tattooed rhymespitter Prof Green, and fast-rising grime popster Wretch 32.