The New York Post’s Page Six says pin-thin rich girl Allegra Versace has checked into an L.A. hospital for anorexia. Fashion maven mama Donatella confirmed that the 20-year-old heirhead has been fighting “very serious disease for many years.”In a statement with daddy Paul Beck, Donatella added, “She is receiving the best medical care possible to help overcome this illness and is responding well.” We can only guess Allegra felt a lot of pressure to squeeze into those expensive gowns. [Photo: Allegra, left, and Donatella last November. Getty Images]