You folks saved my Celebrities! I was going to take a picture of Donna's big tomato to the garden and yell at my plants. Glad to hear it is a different variety :-D ! Sometimes the inadvertent "mistake" seed works out really well. We have Vegetable Marrow squash this year which I didn't buy or knowingly plant. Everyone loves it, so next year I'm ordering the seed specifically (and wondering what else I'll get!).
If you read about the Mortgage Lifter tomatoes which is an heirloom, one farmer sold so many of the plants and fruit they paid for his farm. Hence the name, Mortgage Lifter. Maybe you should save the seed.