Mothers of movie stars are no different from other mothers — except that now 50 of them appear in a new book by photographer Joyce Ostin, 43, “Hollywood Moms” (Abrams). Madonna is featured in the book with daughter Lourdes, photographed inside an empty studio while music was playing. “Lourdes’s shoulders started moving to the beat,” said Ostin, who noted how comfortable the 4-year-old was in front of the camera. “She is clearly her mother’s daughter.” Other stars with their moms — or daughters, or sisters — include Hilary Swank, Rosie O’Donnell, Michelle Pfeiffer, Jada Pinkett Smith, Susan Sarandon, Sela Ward, Faith Hill, k.d. lang and covergirls Goldie Hawn and Kate Hudson. Ostin undertook the project to celebrate her remission after a second bout with breast cancer, and she is donating all of her proceeds from the sale of the book to breast cancer research.