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

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. See more from Britain's Got Talent at http://itv.com/talent SUBSCRIBE: http://bit.ly/BGTsub Facebook:   / britainsgottalent   Twitter:   / gottalent   Download the BGT mobile app: http://bit.ly/BGTapp Watch full episodes on ITV Player (UK ONLY): http://www.itv.com/itvplayer