In a new lawsuit, the music executives allege the Purple Rain hitmaker disregarded the fact Judith Hill was signed exclusively to Sony and recorded a top secret album with her.

According to documents, obtained by TMZ.com, Hill, who appeared alongside the late King of Pop in his This Is It concert movie and then went on to appear on U.S. TV talent show The Voice, is currently working with Jolene Cherry, the producer who discovered Lady Gaga, under Sony's supervision.

Despite warnings, Prince allegedly recorded an entire album with Hill and released the tracks as free Internet downloads at the beginning of the week (23Mar15).

Sony bosses and Cherry are demanding damages.