British females have taken the world by storm in the last few years but for all Leona Lewis' technical ability, Lily Allen's feistiness, and Amy Winehouse's retro soul, we've yet to come up with a 24-carat diva able to compete with the likes of Beyoncé or Christina Aguilera. That was a long sentence. Its short counterpoint is "until now". Essex-born Jessie J really does have the lot - not just a belter of a voice (she'd win X Factor at a canter) but serious songwriting pedigree too (she's written hits for Miley Cyrus and Alicia Keys). Chuck in the fact that Justin Timberlake recently named her the best singer in the world and you've got someone virtually guaranteed to hit the big-time in 2011.

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