Trio with similarity to Brunner and Brunner

Here work two singers together: one with deeper
and one with lighter voice.
Has some resemblance to Brunner and Brunner, however,
reveals the singer with lighter voice coming from
the vernacular.
Other pieces of good in total. 3 longplayers where
the singers with lighter voice sometimes throughout alone sings:
Now or never,
The center of the Galaxy,
Lena,
You're my Sissi,
Crazy Love,
The star of our love,
I never forget you,
Only one flower,
Seven Wonders,
If you think I do not love you.