Rebecca Ferguson performs on ‘The Tonight Show with Jay Leno’.

Rebecca Ferguson is often accused of being more boring during her live shows than even Leona Lewis. However, during her recent visit to ‘The Tonight Show with Jay Leno’, the Soul singer let loose and proved that there is some sass hidden behind those innocent eyes.

Belting ‘Run Free’ from her ‘Heaven’ debut album, Ferguson wowed the late nigh audience with her voice and just an extra touch of stage presence. She even ended her set with a signature diva pose! Watch Ferguson on ‘Jay Leno’ and feel the pride swell in your chest as we see her blossom into an entertainer below:

Thoughts?