VIDEO: Jessie J performs 'Mamma Knows Best' on Britain's Got Talent 2011

Britain's Got Talent

We absolutely adore Jessie J and tonight's Britain’s Got Talent live results show showed exactly why, as the singer effortless belted out her new track 'Mamma Knows Best'. The 23-year-old singer from Redbridge in London took to the stage tonight before the latest results were announced.

Speaking to hosts Ant and Dec after her performance, the hot new British star said she had watched and show and was backing "amazing" Out of the Blue to win semi final. Unfortunately for Jessie J (and us!), the guys didn't even make the top three - to the shock of the audiences and judges.

Watch Jessie J perorm on Britain's Got Talent 2011 below...

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