Song: "Heart Of Glass"
Artist: Blondie
Peak position on the Cashbox Singles chart: #1
Number of weeks on the Cashbox Singles chart: 23
Weekly data:
| Week ending | Rank | Title | Artist | Label |
|---|---|---|---|---|
| February 10, 1979 | 88 | Heart Of Glass | Blondie | Chrysalis 2295 |
| February 17, 1979 | 78 | Heart Of Glass | Blondie | Chrysalis 2295 |
| February 24, 1979 | 63 | Heart Of Glass | Blondie | Chrysalis 2295 |
| March 3, 1979 | 50 | Heart Of Glass | Blondie | Chrysalis 2295 |
| March 10, 1979 | 35 | Heart Of Glass | Blondie | Chrysalis 2295 |
| March 17, 1979 | 26 | Heart Of Glass | Blondie | Chrysalis 2295 |
| March 24, 1979 | 21 | Heart Of Glass | Blondie | Chrysalis 2295 |
| March 31, 1979 | 12 | Heart Of Glass | Blondie | Chrysalis 2295 |
| April 7, 1979 | 9 | Heart Of Glass | Blondie | Chrysalis 2295 |
| April 14, 1979 | 6 | Heart Of Glass | Blondie | Chrysalis 2295 |
| April 21, 1979 | 4 | Heart Of Glass | Blondie | Chrysalis 2295 |
| April 28, 1979 | 1 | Heart Of Glass | Blondie | Chrysalis 2295 |
| May 5, 1979 | 2 | Heart Of Glass | Blondie | Chrysalis 2295 |
| May 12, 1979 | 2 | Heart Of Glass | Blondie | Chrysalis 2295 |
| May 19, 1979 | 2 | Heart Of Glass | Blondie | Chrysalis 2295 |
| May 26, 1979 | 3 | Heart Of Glass | Blondie | Chrysalis 2295 |
| June 2, 1979 | 5 | Heart Of Glass | Blondie | Chrysalis 2295 |
| June 9, 1979 | 7 | Heart Of Glass | Blondie | Chrysalis 2295 |
| June 16, 1979 | 15 | Heart Of Glass | Blondie | Chrysalis 2295 |
| June 23, 1979 | 24 | Heart Of Glass | Blondie | Chrysalis 2295 |
| June 30, 1979 | 41 | Heart Of Glass | Blondie | Chrysalis 2295 |
| July 7, 1979 | 48 | Heart Of Glass | Blondie | Chrysalis 2295 |
| July 14, 1979 | 84 | Heart Of Glass | Blondie | Chrysalis 2295 |
Rankings greater than 100 are from the Cashbox 'Looking Ahead' charts.