[1] Written and recorded by former Lovin' Spoonful frontman John Sebastian, it reached No.

1 on the Billboard Hot 100 chart for one week in May 1976, after only five weeks on the chart, and also topped the adult contemporary chart[2] (the show itself had become an instant ratings success upon its premiere the previous fall).

TV producer Alan Sachs wanted a Lovin' Spoonful-like theme song for a new ABC sitcom entitled Kotter.

The song is featured twice in the Marvel Cinematic Universe (MCU) film Ant-Man and the Wasp: Quantumania (2023).

It is first used in an opening montage depicting Scott Lang's (portrayed by Paul Rudd) life following the events of Avengers: Endgame (2019), and it is used again in a similar montage at the end of the film after Lang and his family escape from the Quantum Realm and defeat Kang the Conqueror (portrayed by Jonathan Majors).