| Name | Character | Episodes |
|---|---|---|
| Udo Jürgens | Self | 8 |
| Rex Gildo | Self | 6 |
| Heino | Self | 5 |
| Daliah Lavi | Self | 4 |
| Amanda Lear | Self | 2 |
| Peter Maffay | Self | 2 |
| Cliff Richard | Self | 2 |
| Sacha Distel | Self | 2 |
| Milva | Self | 1 |
| Neil Diamond | Self | 1 |
| John Denver | Self | 1 |
| Donna Summer | Self | 1 |
| Kris Kristofferson | Self | 1 |
| Glen Campbell | Self | 1 |
| Dagmar Koller | Self | 1 |
| Barry Manilow | Self | 1 |
| Bonnie Tyler | Self | 1 |
| Johnny Logan | Self | 1 |
| Dieter Thomas Heck | Self | 1 |
| Lynsey de Paul | Self | 1 |
| Rita Coolidge | Self | 1 |
| Raffaella Carrà | Self | 1 |
| Demis Roussos | Self | 1 |
| Peter Kraus | Self | 1 |
| Tony Christie | Self | 1 |
| Connie Francis | Self | 1 |