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Dr. John (b. 1940) is a colorful pianist, singer, and songwriter, whose music spans, and often combines, blues, boogie woogie, and rock and roll. He is perhaps best known for his 1973 hit song, "Right Place, Wrong Time", which reached #9 on the Billboard Hot 100. Dr. John has also done vocals for Popeyes Chicken & Biscuits' "Luv dat chicken..." jingle, as well as the theme song ("My Opinionation") for the early-1990s television sitcom Blossom. His movie credits include Martin Scorsese's documentary The Last Waltz and Blues Brothers 2000.
The character of Dr. Teeth is partially based on Dr. John. Jim Henson's original sketch for the character (reproduced in Jim Henson's Designs and Doodles) shows the good Doctor as a large, bearded man with sunglasses, a white suit and a wide-brimmed hat. Michael Frith added color to Dr. Teeth's look in his sketch of the character, influenced by Elton John's wild onstage persona. Dr. Teeth's idiosyncratic vocabulary is a reference to Dr. John's N'awlins drawl.
Dr. John also appeared on the 1980 LP In Harmony: A Sesame Street Record, performing "The Sailor and the Mermaid".
He voiced the yak in "Yakety Yak - Take It Back", a recycling PSA that eventually aired on Sesame Street.