The Doobie Brothers began life as a band named after slang for a marijuana joint playing songs that have gone down in pop music history as album rock staples. Among their hits were "Black Water" and "Long Train Running." With band leader Tom Johnston ailing in the mid-1970's, the band turned to former Steely Dan guitarist Jeff Baxter and keyboardist-singer Michael McDonald for leadership. The band was restructured with a soft rock sound dominated by McDonald's distinctive vocals. "What a Fool Believes" is this configuration of the band at its peak. It was the Doobie Brothers' sole #1 pop hit single aside from "Black Water."