The tours normally include a visit to the closet, the bathroom and the kitchen. Knowing these details gives viewers a different, more personal side as to whom the celebrities really are, based on the theory that you can tell a lot about a person by looking in his fridge. The same is true not only about what's in the fridge, but also how it all got there.
Most people shop at the same grocery store time and time again.
By shopping there so often, the place becomes familiar, and a routine becomes established. Some people start with the produce and then go up and down every aisle, comparing brands and looking for bargains. Some people shop every day, getting only the things that are needed right then. When I go to the grocery store, I have the tendency to walk through the store shopping by the times of day that I like to eat. First, I get all things that I'll need to make sandwiches for lunch, because that's the one meal that you're not allowed to skip.