Demi Lovato and David Walliams compare notes on Simon | Semi-Final 3 | Britain's Got Talent 2013

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

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 ...

Demi Lovato and David Walliams compare notes on Simon | Semi-Final 3 | Britain's Got Talent 2013

Demi Lovato and David Walliams compare notes on Simon | Semi-Final 3 | Britain's Got Talent 2013