In fact, one track is titled "Who Let That Django Jazz into the Room," which is an obvious tribute to one inventor of the style of music Williams plays, Django Reinhardt. Like everything else on this album, Williams sings it with a grizzled, scratchy voice, like the true troubadour he is.

Williams has accomplished a lot in his varied career. He's a visual artist, a cartoonist and has written a book about neuroscience. Nope, not your typical pop musician. In addition to his smart and fun adult songs, he's also written songs for a PBS show that earned him an Emmy.

With the many smart songs contained on Tipping My Hat to Leonard, we should also be tipping our hats to David Williams.