David Letterman's Top 10 list has become a favorite bit on Late Show and now we're giving the late night host a taste of his own medicine. Here's ET's favorite Late Show moments.
VIDEO: Letterman Announces Retirement
10. The Top 10 List (sometimes the simplest ideas are the best)
9. Richard Simmons' Cooking Demo Disaster (the fitness guru lit up the stage - literally)
8. Joking About Heart Surgery (Letterman returned to Late Show after quintuple bypass surgery in 2000)
7. Bill Murray (enough said)
6. Reuniting Sonny & Cher (the estranged couple appeared on the show 10 years after their divorce)
5. Throwing Stuff Off the Roof (don't knock it until you try it)
4. Stupid Pet Tricks (if you've ever found yourself entranced by a cat video on YouTube, you get the appeal)
3. Ending Feud with Oprah and Jay Leno (one of the most memorable Super Bowl commercials ever)
2. Drew Barrymore's Birthday Flash (a perfect answer to the question, "What do you get the man who has everything?")
Watch the video to find out what made No. 1.