LOS ANGELES, Calif. -- Cher is in talks to join Christina Aguilera in the movie musical 'Burlesque,' a rep for Screen Gems confirmed to Access Hollywood.The 'Moonstruck' Oscar winner would play the owner of a Los Angeles burlesque club in the Screen Gems film. Christina Aguilera will make her film debut in the lead role, a small-town girl who works at the burlesque and begins to follow her dreams.