Song: "Thunder In My Heart"
Artist: Leo Sayer
Peak position on the Cashbox Singles chart: #35
Number of weeks on the Cashbox Singles chart: 9
Weekly data:
| Week ending | Rank | Title | Artist | Label |
|---|---|---|---|---|
| October 1, 1977 | 81 | Thunder In My Heart | Leo Sayer | Warner Bros. 8465 |
| October 8, 1977 | 67 | Thunder In My Heart | Leo Sayer | Warner Bros. 8465 |
| October 15, 1977 | 57 | Thunder In My Heart | Leo Sayer | Warner Bros. 8465 |
| October 22, 1977 | 49 | Thunder In My Heart | Leo Sayer | Warner Bros. 8465 |
| October 29, 1977 | 43 | Thunder In My Heart | Leo Sayer | Warner Bros. 8465 |
| November 5, 1977 | 38 | Thunder In My Heart | Leo Sayer | Warner Bros. 8465 |
| November 12, 1977 | 35 | Thunder In My Heart | Leo Sayer | Warner Bros. 8465 |
| November 19, 1977 | 47 | Thunder In My Heart | Leo Sayer | Warner Bros. 8465 |
| November 26, 1977 | 62 | Thunder In My Heart | Leo Sayer | Warner Bros. 8465 |
Rankings greater than 100 are from the Cashbox 'Looking Ahead' charts.