I recently made a post with the same tittle, but when I tried to edit it I made a disaster. Please, moderators, delete the first!

I played the keyboard setting it with the piano sound and hummed the chorus melody (I don't remember the lyrics, but I know that it was sung by a female voice).
The song I'm looking for is a house/pop song from the end80's or early 90's and I want to know who is the artist and the song tittle.

This is my humming video:




Answer me, please. Nicolás