who sang the theme song from welcome back kotter
Welcome Back (John Sebastian song) "Welcome Back" is a popular record that was the theme song of the 1970s American television sitcom Welcome Back, Kotter. 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[1] (the show itself had become an instant ratings success upon its premiere the previous fall). It also reached No. 93 on the country chart.