Play of the Day -- Romney on Letterman?

David Letterman challenging Mitt, or Mitch--as he jokingly refers to the presidential candidate, Romney to appear on his show was not the only noteworthy or comical moment from Friday's late-night shows. Jay Leno debuted a new campaign ad by Romney, Jimmy Fallon summed up Americans' sentiments going into the presidential debates, and they all had fun joking about Iranian President Mahmoud Ahmadinejad's visit to the U.N.

Today's Must See Moment -- Fast forward to 1:02 to see Letterman challenge Mitt Romney to appear on his show.