Singh led Woods by 10 shots through six holes, but the margin began to shrink.
Notching four birdies on the front nine, he led by three shots at the turn before everything went wrong for the American.
Daly, who shot a one-under 69, led Woods by three shots through nine holes but slowly saw his lead cut down.
Nicklaus had led by two shots with six holes to play.
Irwin led Aoki by two shots after the 14th.
Robbins, who led by four shots after three rounds, shot a three-under-par 69 yesterday.
Earlier in the year at New Orleans, he led by two shots going into the last round, but shot 75 to finish tied for fourth.
After Sorenstam birdied the third hole, she led by three shots.
Webb led by five shots on the sixth hole, but was in tears after her round.
He never led by fewer than three shots.