Alan Carr, Louis Walsh and Simon Cowell were included in Jon's performance on Saturday and he told This Morning he liked to keep his impersonations "topical"."If I get through to the semi-final, I think I might grow a beard and wear a dress..." he joked, referring to the recent Eurovision winner.Speaking beforehand, he said: "I try to keep my impressions as topical as I can. I look for anyone in the public eye or currently on television."I tend to record TV programs or look at videos on YouTube and watch them over and over again. The best impressions are the ones you can do straight away. It's such a great feeling. I had that with Alan Carr and Alan Hansen."I pick up certain words people say and the way they say them. With Simon it was: "Ok, I'll stop you there"."Before he auditioned, Jon explained how he was following in his father's footstep, as his dad competed in 70s talent show New Faces.He told Phillip and Holly: "My dad...gets much more nervous than I do, but he put the pressure on me as well just before I went on, he went: "No pressure, but I won my heat." Thanks for that dad."And after taking on Simon in his first audition, is Jon planning to include any more BGT voices in his routine?"I'd love to do David Walliams," he said. "I have done some of his Little Britain characters before but not him."I've been planning to do Ant and Dec but they are taking a lot of work. I can do the accent but it is getting their voices that is the hard part."