The "World's Dumbest" crew changes it up this week: We're counting down 20 brilliantly innovative inventions. If you happen to think these products are dumb - hey, to each his own. Check out amazing new ideas for hiding your booze, shaping your body, de-odorizing your farts, and covering your butt crack. Each invention is thoroughly evaluated by our celebrity cast, featuirng Todd Bridges, Danny Bonaduce, Tonya Harding and Daniel Baldwin.