Madonna and Lindsay Lohan are planning an unlikely duet, according to US reports. The odd couple have reportedly become new best friends due to their links to Kabbalah, and now they're in secret talks to record a tune together, according to America's In Touch magazine. And, according to insiders, the couple also plan to appear in a movie together. A source says, "They're helping each other. Madonna's giving Lindsay advice on her music career, and she wants to work on a film with Madonna too." The insider also tells the publication that Madonna and Lohan are planning a trip to Israel together once the MATERIAL GIRL's Confessions world tour is over.