Late Night host Jimmy Fallon talked about a surprise wake up call President Obama got while he was in Chicago for the NATO Summit, and David Letterman gave his monologue to some of Mitt Romney's most adoring fans. Also, Conan O'Brien discussed the intricacies of the Mexican presidential race and he debuted a new walk.

All the late-night hosts found some humor in Mark Zuckerberg's weekend nuptials, and Jay Leno made sure that we say Mitt Romney's and President Barack Obama's latest duet. Lastly, David Letterman showed Mitt Romney's latest campaign video.

Jay Leno of The Tonight Show found the humor in the president's dancing ability, and both he and David Letterman of the Late Show poked fun at the real and fabricated hijinks of presidential candidate Mitt Romney. Also, astroids may hit Earth at any moment and NASA wants to make sure we know what to do.

David Letterman could not get enough of Mitt Romney's infectious laugh, Conan O'Brien proposed a handful of campaign slogans for Vice President Joe Biden, and former presidential candidate Rick Santorum decided to show up and share a piece of his mind.

Former President George W. Bush's unorthodox endorsement of Mitt Romney consumed most of the the late-night chatter, but the hosts still found the time to joke about gay marriage and news from the campaign trail.