(CNN) - Former Utah Gov. Jon Huntsman was the latest 2012 candidate to make the late night rounds Wednesday with an appearance on "The Late Show with David Letterman."
Huntsman, who's polled at the bottom of the 2012 pack thus far, talked up his days in China as the U.S. ambassador under President Obama and showed off his musical talents while jamming with the house band.
He described the nation's relationship with China as "large and complicated," and although he's received criticism from conservatives for serving under a Democratic president, Huntsman argued it would have been less than American for him not to honor President Obama's request.
"We'd just been re-elected by a fairly large margin, and he asked us to step up and serve on this critically important relationship, and you know we'd been trying to crack the code on China," Huntsman said. "I'd lived in the region three times, I speak Chinese…you know, if you can help your country, if you don't do it, it says something about you, you'd be unpatriotic."
The former ambassador also described the U.S.-China relationship as "challenging," but Huntsman noted, "You can't be dropped into a city like Beijing that is full of energy and not get a sense of where the world is going."
Compared with America, Huntsman said he felt, "we're kind of in a funk right now," a feeling that motivated him to run for president.
Joking "the hills are alive," after viewing a family photo complete with his seven children including three daughters on the campaign trail, his two sons in the Naval Academy, and his two younger daughters, Huntsman jumped up to join the band on piano to play a little funk-and soul. He ended his appearance with a few bars from the Chuck Berry classic, "Johnny B. Goode."
Texas Gov. Rick Perry and former Massachusetts Gov. Mitt Romney both delivered the "Top Ten," on the CBS show in previous appearances. Minnesota Rep. Michele Bachmann paid a visit to "Late Night with Jimmy Fallon."