I give you a list of my favorite musical Late Night moments.
Stephen Colbert sings Rebecca Black's Friday
Lip Sync Battle with Joseph Gordon Levitt and Stephen Merchant
Evolution of Mom Dancing with Michelle Obama
Bruce Springsteen and "Bruce Springsteen" singing Born to Run
Jimmy Fallon, The Roots, and Mariah Carey sing All I Want for Christmas while playing classroom instruments
Finally, his farewell to Late Night with the Muppets.
Post your personal favorites in the comments!