STELLA'S BABY NEW YEAR: Stella McCartney has given birth to baby number three, a boy named Beckett Robert Lee Willis. The baby was born Tuesday morning in London, and a spokesman for the designer said mother and child are doing fine. McCartney also has every intention of going ahead with her fall show in Paris, which is scheduled for Feb. 28. McCartney and her husband, Alasdhair Willis, have two elder children, Miller Alasdhair James Willis, who was born in February 2005, and Bailey Linda Olwyn Willis, who was born in December 2006.
