Here's a start:
- Movie: Walt Disney's Pinocchio (Lampwick lights a match against it) link
- Play: Annie (Daddy Warbucks is presented the ML for purchase)
- TV Show: Heroes (The "flash" woman has stolen it and stashed it in her apartment)
- Movie: The Freshman
- Movie: Dr. No

Where else is this used (and arguably now cliche)? (I have to credit Children of Men for NOT having ML in the art collection.)
Note: I'm not looking for variations or derivative works, cartoons, mugs, shower curtains, etc., but rather scenes or other presentations of the "actual" Mona Lisa showing up in places outside the Louvre.