SYDNEY, Australia - Charlie Bell, who began his McDonald's Corp. career as a part-time worker in a suburban Sydney restaurant and later became chief executive of the fast-food icon, died early Monday of colon cancer in his native Australia. He was 44. Bell was replaced as CEO by Jim Skinner, the Oak Brook, Ill.-based company's third CEO in a year. Bell was chosen to follow former chief James Cantalupo, who died of a heart attack in April 2004.