This is one you'll want to share with your friends. Sure, Josh Groban always puts on a great show. But it's his sense of humor that always seems to catch me by surprise. (Remember the Kanye West Tweets?)

Hit the jump to see Josh singing last night's "Late Show with David Letterman" Top-Ten List. Hilarious! And if you missed Josh's show at the Palace, be sure to catch the video of the adorable 3-year-old boy that sang The National Anthem with Josh.

The category: Top ten rejected Josh Groban songs.