Lisa Sampson s playing with fire! Semi-Final 4 Britain s Got Talent 2015

There were plenty of gatecrashers on tonight's chat - Isaacs's parents joined Stephen on the sofa and Jules and Matisse called in.

If that's not enough - Stephen also had a clip of The Neales behind the scenes.

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

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