John Sebastian
![Sebastian in 1974](https://upload.wikimedia.org/wikipedia/commons/2/24/John_Sebastian_2_-_1974_%28cropped%29.jpg)
He made an impromptu appearance at the Woodstock festival in 1969 and scored a U.S. No. 1 hit in 1976 with "Welcome Back", which was used as the theme song on the sitcom Welcome Back, Kotter.
Sebastian was inducted into the Rock and Roll Hall of Fame in 2000 as a member of the Lovin' Spoonful. Provided by Wikipedia
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