Rosenberg's musical career was consolidated throughout the 1970s with hits such as "Fremder Mann" ("Stranger"), "Er gehört zu mir" ("He belongs to me"), "Ich bin wie du" ("I am like you") which was later sampled by Blue Adonis on their track "Disco Cop", "Marleen", and "Lieder der Nacht" ("Songs of the Night"), often making appearances on TV and radio.

[1] Her career underwent another revival in 1989 with the hit song "I Need Your Love Tonight" from the soundtrack Rivalen der Rennbahn ("Racetrack Rivals"), written by Dieter Bohlen.

Rosenberg's attempts to sing in Eurovision took a surprising turn in 1976 when she was shortlisted to represent Luxembourg with the song "Tout peut arriver au cinéma".

In 1978, Rosenberg competed in the German heats again, and this time placed seventh with "Nein, weinen werd' ich nicht" ("No, I Won't Cry").

Her 1980 entry "Ich werd' da sein, wenn es Sturm gibt" ("I'll Be There If There Is a Storm") was not as successful, finishing twelfth (and last).