Song: "What A Fool Believes"
Artist: Doobie Brothers
Peak position on the Cashbox Singles chart: #1
Number of weeks on the Cashbox Singles chart: 21
Weekly data:
| Week ending | Rank | Title | Artist | Label |
|---|---|---|---|---|
| January 27, 1979 | 54 | What A Fool Believes | Doobie Brothers | Warner Bros. 8725 |
| February 3, 1979 | 40 | What A Fool Believes | Doobie Brothers | Warner Bros. 8725 |
| February 10, 1979 | 31 | What A Fool Believes | Doobie Brothers | Warner Bros. 8725 |
| February 17, 1979 | 24 | What A Fool Believes | Doobie Brothers | Warner Bros. 8725 |
| February 24, 1979 | 15 | What A Fool Believes | Doobie Brothers | Warner Bros. 8725 |
| March 3, 1979 | 10 | What A Fool Believes | Doobie Brothers | Warner Bros. 8725 |
| March 10, 1979 | 8 | What A Fool Believes | Doobie Brothers | Warner Bros. 8725 |
| March 17, 1979 | 6 | What A Fool Believes | Doobie Brothers | Warner Bros. 8725 |
| March 24, 1979 | 3 | What A Fool Believes | Doobie Brothers | Warner Bros. 8725 |
| March 31, 1979 | 2 | What A Fool Believes | Doobie Brothers | Warner Bros. 8725 |
| April 7, 1979 | 1 | What A Fool Believes | Doobie Brothers | Warner Bros. 8725 |
| April 14, 1979 | 1 | What A Fool Believes | Doobie Brothers | Warner Bros. 8725 |
| April 21, 1979 | 3 | What A Fool Believes | Doobie Brothers | Warner Bros. 8725 |
| April 28, 1979 | 4 | What A Fool Believes | Doobie Brothers | Warner Bros. 8725 |
| May 5, 1979 | 4 | What A Fool Believes | Doobie Brothers | Warner Bros. 8725 |
| May 12, 1979 | 7 | What A Fool Believes | Doobie Brothers | Warner Bros. 8725 |
| May 19, 1979 | 9 | What A Fool Believes | Doobie Brothers | Warner Bros. 8725 |
| May 26, 1979 | 15 | What A Fool Believes | Doobie Brothers | Warner Bros. 8725 |
| June 2, 1979 | 41 | What A Fool Believes | Doobie Brothers | Warner Bros. 8725 |
| June 9, 1979 | 59 | What A Fool Believes | Doobie Brothers | Warner Bros. 8725 |
| June 16, 1979 | 88 | What A Fool Believes | Doobie Brothers | Warner Bros. 8725 |
Rankings greater than 100 are from the Cashbox 'Looking Ahead' charts.