Song: "Don't Know Much"
Artist: Bill Medley
Peak position on the Cashbox Singles chart: #88
Number of weeks on the Cashbox Singles chart: 4
Weekly data:
| Week ending | Rank | Title | Artist | Label |
|---|---|---|---|---|
| March 28, 1981 | 95 | Don't Know Much | Bill Medley | Liberty 1402 |
| April 4, 1981 | 92 | Don't Know Much | Bill Medley | Liberty 1402 |
| April 11, 1981 | 88 | Don't Know Much | Bill Medley | Liberty 1402 |
| April 18, 1981 | 91 | Don't Know Much | Bill Medley | Liberty 1402 |
Rankings greater than 100 are from the Cashbox 'Looking Ahead' charts.