Song: "Endless Love"
Artist: Diana Ross & Lionel Richie
Peak position on the Cashbox Singles chart: #1
Number of weeks on the Cashbox Singles chart: 29
Weekly data:
| Week ending | Rank | Title | Artist | Label |
|---|---|---|---|---|
| July 4, 1981 | 71 | Endless Love | Diana Ross & Lionel Richie | Motown 1519 |
| July 11, 1981 | 47 | Endless Love | Diana Ross & Lionel Richie | Motown 1519 |
| July 18, 1981 | 34 | Endless Love | Diana Ross & Lionel Richie | Motown 1519 |
| July 25, 1981 | 20 | Endless Love | Diana Ross & Lionel Richie | Motown 1519 |
| August 1, 1981 | 11 | Endless Love | Diana Ross & Lionel Richie | Motown 1519 |
| August 8, 1981 | 6 | Endless Love | Diana Ross & Lionel Richie | Motown 1519 |
| August 15, 1981 | 1 | Endless Love | Diana Ross & Lionel Richie | Motown 1519 |
| August 22, 1981 | 1 | Endless Love | Diana Ross & Lionel Richie | Motown 1519 |
| August 29, 1981 | 1 | Endless Love | Diana Ross & Lionel Richie | Motown 1519 |
| September 5, 1981 | 1 | Endless Love | Diana Ross & Lionel Richie | Motown 1519 |
| September 12, 1981 | 1 | Endless Love | Diana Ross & Lionel Richie | Motown 1519 |
| September 19, 1981 | 1 | Endless Love | Diana Ross & Lionel Richie | Motown 1519 |
| September 26, 1981 | 1 | Endless Love | Diana Ross & Lionel Richie | Motown 1519 |
| October 3, 1981 | 1 | Endless Love | Diana Ross & Lionel Richie | Motown 1519 |
| October 10, 1981 | 1 | Endless Love | Diana Ross & Lionel Richie | Motown 1519 |
| October 17, 1981 | 2 | Endless Love | Diana Ross & Lionel Richie | Motown 1519 |
| October 24, 1981 | 2 | Endless Love | Diana Ross & Lionel Richie | Motown 1519 |
| October 31, 1981 | 2 | Endless Love | Diana Ross & Lionel Richie | Motown 1519 |
| November 7, 1981 | 3 | Endless Love | Diana Ross & Lionel Richie | Motown 1519 |
| November 14, 1981 | 3 | Endless Love | Diana Ross & Lionel Richie | Motown 1519 |
| November 21, 1981 | 6 | Endless Love | Diana Ross & Lionel Richie | Motown 1519 |
| November 28, 1981 | 38 | Endless Love | Diana Ross & Lionel Richie | Motown 1519 |
| December 5, 1981 | 47 | Endless Love | Diana Ross & Lionel Richie | Motown 1519 |
| December 12, 1981 | 61 | Endless Love | Diana Ross & Lionel Richie | Motown 1519 |
| December 19, 1981 | 66 | Endless Love | Diana Ross & Lionel Richie | Motown 1519 |
| December 26, 1981 | 75 | Endless Love | Diana Ross & Lionel Richie | Motown 1519 |
| January 2, 1982 | 75 | Endless Love | Diana Ross & Lionel Richie | Motown 1519 |
| January 9, 1982 | 75 | Endless Love | Diana Ross & Lionel Richie | Motown 1519 |
| January 16, 1982 | 99 | Endless Love | Diana Ross & Lionel Richie | Motown 1519 |
Rankings greater than 100 are from the Cashbox 'Looking Ahead' charts.