Yes. Depends who you consider a celebrity chef. There are quite a few contestants of various reality TV cooking shows that I've seen preparing my food.
If you mean someone with more notoriety, who has had a career as a "celebrity" chef, I've also had food prepared by Bobby Flay, Michael Psilakis, and Amanda Freitag.
You can also eat food by, and meet, many celebrity chefs at events such as the Food & Wine Classic in Aspen
(coming up in a few weeks).