Russell Grant said that he enjoyed switching on Thame’s lights more than Oxford, after being the guest of honour.
The celebrity astronomer was invited to flick the switch in front of a crowd of 2,000.
The evening also featured live music from school children and Thame Chamber Choir.
It was rounded off with a firework display.
Mayor Nigel Champken Woods said: “It was fantastic, there was a superb atmosphere and I think it was the best lights switch-on that we have ever had.
“I think Russell Grant was good value for money. He just entered into the spirit of it.
“He even spent £30 in the book shop, The Book House, and said it was really great to find an independent book store because they are few and far between.
“He was really pleasant and down to earth and chatty. He said he enjoyed switching on the lights in Thame more than in Oxford, as the crowd were more responsive.
“I think this year the big difference was that we closed the High Street to traffic, which we haven’t done before. I think it worked really well.”
The event also featured a display by volunteers with the Thame Skate Park Youth Project, which aims to improve their current facilities.