Madonna Tackles New Song, Film Role

April 10 [7:55 EST] -- Madonna has contributed an unreleased song she recorded in 1994, called "Freedom," to a benefit album for the Rainforest Foundation International.

The compilation, called "Carnival," also includes tracks by Shawn Colvin, Annie Lennox, Tina Turner, Elton John, and, of course, rainforest supporter Sting, whose wife, Trudy Styler, produced the record.

"Carnival" will be released on April 29, the day before the eighth annual Rainforest Foundation benefit concert at New York's Carnegie Hall.

Madonna also has a role in an upcoming film by "Blade Runner" director Ridley Scott, called "RKO 281." The film tells the 1945 story of how newspaper magnate William Randolph Hearst attempted to destroy a movie clearly based on his life, Orson Welles' debut feature, "Citizen Kane" (frequently cited by film critics as the greatest movie ever made).

Marlon Brando

has

reportedly already been cast as Hearst, and Edward Norton ("The People Vs. Larry Flynt," "Primal Fear") as Welles. The part Madonna has her eye on is that of Welles' loyal mistress, actress Marion Davies.