Krystyna Pronko in 4 albums

From discogs (where else?):

Born 14 January 1947 in Gorzów Wielkopolski, Poland. Polish singer, composer and musical pedagogue. Sister of Piotr Prońko and Wojciech Prońko.

Well she's famous enough to have a wikipedia page, if you're interested.

Just as you might expect the music starts with bluesy funky rock, luckily with minimal if any cover versions, all original compositions by various Polish songwriters, and then moves into the sappy pop-rock territory that was de rigeur in the later seventies carrying on into the 1983 album. She did make more later but I found that last one had so little worth hearing I didn't dare step foot into the later parts of the decade which, I would predict, feature digital percussion electric keys and jumpy rhythms.

From the 1978 album, track 6:

From 1980, something called Poranne lzy (which I quite enjoy):