We never doubted Jessie J had an incredible vocal range but her onstage performance during American Idol 2013, the final results show, totally confirmed it. Damn, the girl can hit the high - and low - notes.
As for Jessie's stateside onstage style - she went for a plunging print playsuit, black stilettos and oversized ghetto gold earrings all of which worked with the cropped blonde do.
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Jessie performed with finalist Angie Miller to show her exactly how to bring down the house. And she wasn't the only lady representing British talent either - Emeli Sande also belted out a cracking performance. Even the likes of J-Lo pitched up to perform her new single Live It Up, check out ALL the onstage pictures in our gallery below: