 In 1989, Prince appeared on Madonna's studio album "Like a Prayer", co-writing and singing the duet "Love Song" and playing electric guitar (uncredited) on the songs "Like a Prayer", "Keep It Together", and "Act of Contrition".He also began work on several musical projects, including "Rave Unto the Joy Fantastic" and early drafts of his "Graffiti Bridge" film, but both were put on hold when he was asked by "Batman" (1989) director Tim Burton to record several songs for the upcoming live-action adaptation.Prince went into the studio and produced an entire nine-track album that Warner Bros. released on June 20, 1989.