Model railroad enthusiast Rod Stewart even takes his hobby on the road. Stewart's concert rider asks for a large table to be set up in his dressing room so he can build miniature buildings for his model train set. He pays careful attention not to inhale the fumes from the glue, as they can affect his voice. And he never drinks before working on his set, saying "the results are never good."

Stewart has 1500 square feet of track laid out in his Beverly Hills home and spends four hours a day on his hobby. His train set is inspired by 1940s New York Central and Pennsylvania railroads and features skyscrapers that are more than five feet tall.

Do you have a hobby like this?  I used to collect Holstein cow stuff like cups, plates, anything with black and white spots on it.  It just got out of control!