Song: "That Once In A Lifetime"
Artist: Demis Roussos
Peak position on the Cashbox Singles chart: #79
Number of weeks on the Cashbox Singles chart: 8
Weekly data:
| Week ending | Rank | Title | Artist | Label |
|---|---|---|---|---|
| May 27, 1978 | 97 | That Once In A Lifetime | Demis Roussos | Mercury 73992 |
| June 3, 1978 | 93 | That Once In A Lifetime | Demis Roussos | Mercury 73992 |
| June 10, 1978 | 93 | That Once In A Lifetime | Demis Roussos | Mercury 73992 |
| June 17, 1978 | 91 | That Once In A Lifetime | Demis Roussos | Mercury 73992 |
| June 24, 1978 | 86 | That Once In A Lifetime | Demis Roussos | Mercury 73992 |
| July 1, 1978 | 82 | That Once In A Lifetime | Demis Roussos | Mercury 73992 |
| July 8, 1978 | 80 | That Once In A Lifetime | Demis Roussos | Mercury 73992 |
| July 15, 1978 | 79 | That Once In A Lifetime | Demis Roussos | Mercury 73992 |
Rankings greater than 100 are from the Cashbox 'Looking Ahead' charts.