Song: "You Light Up My Life"
Artist: Debby Boone
Peak position on the Cashbox Singles chart: #1
Number of weeks on the Cashbox Singles chart: 28
(27 weeks in the Top 100)
Weekly data:
| Week ending | Rank | Title | Artist | Label |
|---|---|---|---|---|
| August 20, 1977 | 107 | You Light Up My Life | Debby Boone | Warner/Curb 8455 |
| August 27, 1977 | 79 | You Light Up My Life | Debby Boone | Warner/Curb 8455 |
| September 3, 1977 | 68 | You Light Up My Life | Debby Boone | Warner/Curb 8455 |
| September 10, 1977 | 52 | You Light Up My Life | Debby Boone | Warner/Curb 8455 |
| September 17, 1977 | 38 | You Light Up My Life | Debby Boone | Warner/Curb 8455 |
| September 24, 1977 | 25 | You Light Up My Life | Debby Boone | Warner/Curb 8455 |
| October 1, 1977 | 7 | You Light Up My Life | Debby Boone | Warner/Curb 8455 |
| October 8, 1977 | 1 | You Light Up My Life | Debby Boone | Warner/Curb 8455 |
| October 15, 1977 | 1 | You Light Up My Life | Debby Boone | Warner/Curb 8455 |
| October 22, 1977 | 1 | You Light Up My Life | Debby Boone | Warner/Curb 8455 |
| October 29, 1977 | 1 | You Light Up My Life | Debby Boone | Warner/Curb 8455 |
| November 5, 1977 | 1 | You Light Up My Life | Debby Boone | Warner/Curb 8455 |
| November 12, 1977 | 1 | You Light Up My Life | Debby Boone | Warner/Curb 8455 |
| November 19, 1977 | 1 | You Light Up My Life | Debby Boone | Warner/Curb 8455 |
| November 26, 1977 | 1 | You Light Up My Life | Debby Boone | Warner/Curb 8455 |
| December 3, 1977 | 3 | You Light Up My Life | Debby Boone | Warner/Curb 8455 |
| December 10, 1977 | 3 | You Light Up My Life | Debby Boone | Warner/Curb 8455 |
| December 17, 1977 | 3 | You Light Up My Life | Debby Boone | Warner/Curb 8455 |
| December 24, 1977 | 3 | You Light Up My Life | Debby Boone | Warner/Curb 8455 |
| December 31, 1977 | 5 | You Light Up My Life | Debby Boone | Warner/Curb 8455 |
| January 7, 1978 | 5 | You Light Up My Life | Debby Boone | Warner/Curb 8455 |
| January 14, 1978 | 11 | You Light Up My Life | Debby Boone | Warner/Curb 8455 |
| January 21, 1978 | 15 | You Light Up My Life | Debby Boone | Warner/Curb 8455 |
| January 28, 1978 | 20 | You Light Up My Life | Debby Boone | Warner/Curb 8455 |
| February 4, 1978 | 38 | You Light Up My Life | Debby Boone | Warner/Curb 8455 |
| February 11, 1978 | 46 | You Light Up My Life | Debby Boone | Warner/Curb 8455 |
| February 18, 1978 | 61 | You Light Up My Life | Debby Boone | Warner/Curb 8455 |
| February 25, 1978 | 96 | You Light Up My Life | Debby Boone | Warner/Curb 8455 |
Rankings greater than 100 are from the Cashbox 'Looking Ahead' charts.