What Amy Winehouse recording has just her and a basse, bass guitar?

Hi,
I'm not real familiar with all of Amy Winehouse's discography, but I remember hearing a song par her that was just her chant along with a basse, bass as the music... no horns/guitars/drums.
It was a really great song, but I never found out the name, and I have been unable to find it since.

Do any of toi know what song I am thinking of, and do toi know where I might be able to find it?

Thank you.