The 2013 iTunes Festival continues to be the gift that keeps on giving.
Having already served up super charged sets from the likes of Lady GaGa and Janelle Monae, it was Jessie J‘s turn to rock the stage at the London-based extravaganza.
Currently celebrating the release of sophomore set ‘Alive’, the Pop powerhouse surprised the thousands in attendance by bringing out Brandy to perform their new duet ‘Conquer The World’.
Watch Jessie and the Vocal Bible serve up a sermon on how to electrify a stage after the jump…