What's the record - rare ish, female vocalist, jazz singer, the story I was told was she only recorded it as a favour when she went into a studio to record something else?

I'm aware of the paucity of information here (and even that could be wrong)... bit of a Hail Mary pass but I bet someone knows it. 

Thanking you all in advance 😂

 

It's very well known by the way. I just can't bloody remember it. 

Are you thinking of Karmello Brooks ?

Cheers Alan I actually felt that in my brain 

Bit more than rare ish