Song: "Mr. Blue Sky"
Artist: Electric Light Orchestra
Peak position on the Cashbox Singles chart: #27
Number of weeks on the Cashbox Singles chart: 12
Weekly data:
| Week ending | Rank | Title | Artist | Label |
|---|---|---|---|---|
| June 24, 1978 | 77 | Mr. Blue Sky | Electric Light Orchestra | Jet 5050 |
| July 1, 1978 | 63 | Mr. Blue Sky | Electric Light Orchestra | Jet 5050 |
| July 8, 1978 | 54 | Mr. Blue Sky | Electric Light Orchestra | Jet 5050 |
| July 15, 1978 | 46 | Mr. Blue Sky | Electric Light Orchestra | Jet 5050 |
| July 22, 1978 | 35 | Mr. Blue Sky | Electric Light Orchestra | Jet 5050 |
| July 29, 1978 | 31 | Mr. Blue Sky | Electric Light Orchestra | Jet 5050 |
| August 5, 1978 | 29 | Mr. Blue Sky | Electric Light Orchestra | Jet 5050 |
| August 12, 1978 | 28 | Mr. Blue Sky | Electric Light Orchestra | Jet 5050 |
| August 19, 1978 | 27 | Mr. Blue Sky | Electric Light Orchestra | Jet 5050 |
| August 26, 1978 | 39 | Mr. Blue Sky | Electric Light Orchestra | Jet 5050 |
| September 2, 1978 | 53 | Mr. Blue Sky | Electric Light Orchestra | Jet 5050 |
| September 9, 1978 | 92 | Mr. Blue Sky | Electric Light Orchestra | Jet 5050 |
Rankings greater than 100 are from the Cashbox 'Looking Ahead' charts.