Raddie, aged 39, of Cannock, thanked the star on Twitter, saying: "Sorry for the breakdown but you've made my two daughters very happy in Cannock!"
She added: "Totally unexpected but thank you so much."
The 48-year-old ex-Friends star was revealed among the programme's new line-up of hosts earlier this month.The Top Gear duo kicked off filming for the first episode of the new series with a 370 kilometre road trip to Blackpool, setting off from BBC's Broadcasting House in London on Saturday.
Also joining the line-up are Formula 1 commentator Eddie Jordan, German racing driver Sabine Schmitz, motoring journalist Chris Harris and car reviewer Rory Reid.
LeBlanc tweeted ahead of filming, calling the Top Gear crew a "great group of lunatics" and adding: "We start filming in the morning. I'm pumped."
Met the @BBC_TopGear crew today. What a great group of lunatics. We start filming in the morning. I'm pumped.