Valerie Bertinelli Revealed The Rudest Celebrity She's Ever Met

Valerie Bertinelli has been known as one of the friendliest and most relatable celebrities in the business since her breakout role as Barbara Cooper on the CBS sitcom "One Day at a Time" back in 1975. These days, she stays busy in a different role: celebrity chef! She currently hosts "Valerie's Home Cooking" and "Kids Baking Championship" on the Food Network, and "Valerie's Home Cooking" sees her interact with celebs young and old. But there's one star she likely won't have on as a guest, because Valerie Bertinelli revealed the rudest celebrity she's ever met in an appearance on "Watch What Happens Live." Here's the tea.