Forgot and act's name - 70s and 80s music fans help!

[Remy]

Hi everyone!
I identified a song and its performer one day by googling a part of the lyrics I managed to write down after hearing it on the radio... now i forgot completely, and I really need it! What I DO remember:

- 70s - maybe early 80s sound - funky, melodic, many chord progressions
- female vocalist
- it was a band, the name was comprised of TWO LAST NAMES : the first one was the - girl singer's last name, the other - a guy's last name
- the girl played the piano

I'd be really grateful if you could help!