Madonna claims producer Diplo is a "slave driver" in the studio.

The "Hung Up" hitmaker is making music with Katy Perry's rumored boyfriend and admits he pushed her to her limits when the pair teamed up together. Madonna posted a photograph of her on a laptop on her Instagram account, with the caption, "Working with @Diplo got me like................WHAAaaat? [sic]."

She later added a photograph of herself looking tired after a long session working on new ideas and wrote, "Diplo is a slave driver! Got me working all hours of the night in the studio. Had to sneak into the bathroom! #clicclacclicclacbitchgetoffmyback [sic]."

Diplo, who has had success with his electronic music project Major Lazer, has previously worked with the likes of Beyonce, Rita Ora, Tinie Tempah and Justin Bieber and is known for his reggae-inspired music.

Meanwhile, Madonna has also been in the studio with dance music star Avicii, who produced Coldplay's new single "A Sky Full Of Stars" and she's set to release new material in coming months.