Doctor, You've Got to Be Kidding! (1967), 6

Heather is the lead singer for a band that is on its way to fame and fortune. Things get complicated when she becomes pregnant and has three men willing to be both husband and father. But her boss isn't one of them.
1h 34min | Comedy, Music, Romance | 10 May 1967 | Color, ws
Director: Peter Tewksbury
Stars: Sandra Dee, George Hamilton, Celeste Holm, Bill Bixby, Dwayne Hickman, Mort Sahl.
Earl Barton ... musical numbers staged by

https://www.imdb.com/title/tt0061585/
Watched online: part 1, part 2; blurry.

6 songs in the Soundtracks.

SD does not have a great singing voice, and she's delivering the songs.

Yes, the title refers to pregnancy, unwed, and they use the word. She knows who the father is, but refuses to tell him. Hence the 3 men who are willing to marry her.

It's not great comedy, but engaging enough. This can be cited as a film that needs a rating.

Nichelle Nichols is near the beginning of her Star Trek tenure ('66-'69); plays a secretary here.

distr. Columbia, dir. Tewksbury; 6