If you're a fan of the sitcoms, you know it's usually a pretty big deal when an A-List (0r even B-List) celebrity makes an appearance on a show when they're not a part of the cast.  How many actors do you think you've heard on the old Kelsey Grammar show "Fraiser?"  Probably more than you think.  Dr. Fraiser Crane had his own radio show were "patients" could call in with their problems.

Have you ever watched the show and thought one of the callers sounded familiar?  Probably because it was a celebrity!  From John Cusack to Helen Mirren, here's a highlight video of some of Dr. Crane's most famous callers.