Demi Lovato and David Walliams compare notes on Simon | Semi-Final 3 | Britain's Got Talent 201

Hey jealousy! David Walliams and Demi Lovato speak about Simon!
We were expecting some BGMT fireworks putting David and Simon's X Factor co-host Demi Lovato on the sofa together.
If you missed it on the show, see what happened.

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