"What a Fool Believes" is a song written by Michael McDonal and Kenny Loggins, and recorded by The Doobie Brothers for their 1978 album Minute by Minute (with McDonald singing lead vocals). The single reached number one on the Billboard Hot 100 on April 14, 1979, remaining in that position for just one week. However, the song received 1980 Grammy Awards for both Song of the Year and Record of the Year.