Vanna White

It's puzzling how "Wheel of Fortune" hostess Vanna White looks so good. Here's the 29-year-old back in 1986 (left) -- and 24 years later, the 53-year-old version at an event in L.A. this week (right). Big money.

Pat Sajak and Vanna White put in some extra time on the set of "Wheel of Fortune" this week-- shooting a tribute for the show's legendary announcer Charlie O'Donnell, who passed away Monday. We're told Pat and Vanna each said some kind words about the 78-year-old TV veteran -- and gave an intro to…