Madonna has confirmed that she's collaborated with Alicia Keys on a song that will feature on her new album.

The 56-year-old pop icon posted a picture on Instagram, claiming that Keys had been "killing it" while recording for her upcoming LP.

Madonna has yet to confirm the release date for her 13th studio album, but has been teasing the recording process on Instagram with the hashtag #UnapologeticBitch.

The singer made the post in support of Keys's #WeAreHere project, named after her new single We Are Here, which calls for a more peaceful world for children.