Song: "Good Girls Don't"
Artist: Knack
Peak position on the Cashbox Singles chart: #11
Number of weeks on the Cashbox Singles chart: 16
Weekly data:
| Week ending | Rank | Title | Artist | Label |
|---|---|---|---|---|
| September 8, 1979 | 66 | Good Girls Don't | Knack | Capitol 4771 |
| September 15, 1979 | 49 | Good Girls Don't | Knack | Capitol 4771 |
| September 22, 1979 | 38 | Good Girls Don't | Knack | Capitol 4771 |
| September 29, 1979 | 28 | Good Girls Don't | Knack | Capitol 4771 |
| October 6, 1979 | 20 | Good Girls Don't | Knack | Capitol 4771 |
| October 13, 1979 | 18 | Good Girls Don't | Knack | Capitol 4771 |
| October 20, 1979 | 14 | Good Girls Don't | Knack | Capitol 4771 |
| October 27, 1979 | 12 | Good Girls Don't | Knack | Capitol 4771 |
| November 3, 1979 | 11 | Good Girls Don't | Knack | Capitol 4771 |
| November 10, 1979 | 11 | Good Girls Don't | Knack | Capitol 4771 |
| November 17, 1979 | 13 | Good Girls Don't | Knack | Capitol 4771 |
| November 24, 1979 | 26 | Good Girls Don't | Knack | Capitol 4771 |
| December 1, 1979 | 41 | Good Girls Don't | Knack | Capitol 4771 |
| December 8, 1979 | 53 | Good Girls Don't | Knack | Capitol 4771 |
| December 15, 1979 | 66 | Good Girls Don't | Knack | Capitol 4771 |
| December 22, 1979 | 94 | Good Girls Don't | Knack | Capitol 4771 |
Rankings greater than 100 are from the Cashbox 'Looking Ahead' charts.