Another 80's/90's pop song I want to hear...

[nicolas2014alcubo]

Hello!
This is my recently new video I made:

https://www.youtube.com/watch?v=k7qwKa7KgcY

It's a pop song from the 80's/90's that I listened when I was a child. I don't remember the lyrics but some of the chorus tune only for humming!
Please, listen to it and try to identify the song.
Tell me the artist and title, please.
Thanks!!!
Nicolás, a fan of pop music (Oldies)

 

[nicolas2014alcubo]

Another thing i remember of this song is that the key signature of the song is A MAJOR, but near the end it changes to B MAJOR.

 

[METALPRIEST]

Hmmmm

 

[nicolas2014alcubo]

There's a lot of old 80's/90's songs that we actually don't hear in any radio!!!. We can call it "Forgotten old songs that we want to hear again."
I hummed another song a capella
Somebody remembers this song?

https://www.youtube.com/watch?v=PZkypxNDivs