Letterman: Top Ten Reasons Obama Appeared on Show (Video)

TOP TEN REASONS PRESIDENT OBAMA AGREED TO APPEAR ON THE LATE SHOW

10. Heard the lady with the heart-shaped potato was going to be here

9. Thought it would be fun to watch someone else get heckled

8. Has something to do with that whole "Cash For Clunkers" thing

7. Every president since Teddy Roosevelt has been here

6. In this economy, someone offers you $600, you take it

5. We told him Megan Fox would be here

4. Needed a place to hang out until check-in time at his hotel

3. Honestly, I have no idea

2. Said, "Yes" without thinking... like Bush did with Iraq

1. Wanted to congratulate Dave on the big Emmy win

Video.