See more from Britain's Got Talent at itv.com/talent

She's cute as a button, but don't get on the wrong side of this fearsome nine-year-old from County Armagh!
Jesse melts the Judges' hearts when she first appears on stage, but they're not expecting what happens next...
Could Simon have met his match?

SUBSCRIBE: bit.ly/BGTsub
Facebook: www.facebook.com/BGT
Twitter: twitter.com/BGT