Robert Goulet by Denise Truscello/ Robert Goulet by Denise Truscello/

Singer Robert Goulet, whose career was launched in 1960 with Broadway's Camelot, died on Tuesday while awaiting a lung transplant. He was 73.

Goulet last month had been diagnosed with a rare form of pulmonary fibrosis, but remained in good spirits to the very end. As his wife relates to the AP, he told doctors, "Just watch my vocal cords" before they inserted a breathing tube. Longtime friend Wayne Newton remembers Goulet for his sense of humor, saying he "kept my spirits up in some of the lowest valleys in my life.... God now has another singing angel by his side."