Robert Goulet, the handsome, big-voiced baritone whose Broadway debut in "Camelot" launched an award-winning stage and recording career, has died. He was 73. The singer died Tuesday morning in a Los Angeles hospital while awaiting a lung transplant, Norm Johnson, a spokesman for Goulet, said in an e-mail. He had been awaiting a lung transplant at Cedars-Sinai Medical Center in Los Angeles after being diagnosed in September with a rare form of pulmonary fibrosis. Goulet had remained in good spirits even as he waited for the critically needed transplant, said Vera Goulet, his wife of 25 years. "Just watch my vocal cords," she said he told doctors before they inserted a breathing tube.