As part of her new short film SecretProjectRevolution, Madonna has unveiled a cover of Elliott Smith’s Between The Bars.

Premiered last night during the SecretProjectRevolution launch party, the star sang the track accompanied by just a piano.

Bizarrely, with her whole new project being around how screwed up the current global prison system is, Between The Bars is not actually about prisons. At least it sounded in tip-top shape anyhow.

Check out the cover video and let us know your thoughts.