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Mexican star Lorena Ochoa winks and waves to the cheering gallery on the 14th green as she goes on to defeat an elite 20-player field to win the Samsung World Championship at Bighorn Golf Club in Palm Desert, California on October 14, 2007. Ochoa shot a 66, the lowest score of the day, to wind up with an 18-under par for the four days of play, four shots ahead of runner-up Mi Hyun Kim. (UPI Photo/Christine Chew)

Ochoa collected $300,000 after finishing at 20-under 268 for her 18th win on the LPGA Tour.

Former No. 1 Annika Sorenstam closed with a 1-under 71 for second-place. Sorenstam has a win and two runner-up finishes this season.

"I knew I could do it," said Ochoa, who led by eight strokes entering the final found at the Tanah Merah Country Club course.

Heavy rain halted play twice, the first time for an hour, and later in the round for more than an hour.

Paula Creamer, who had been tied with Sorenstam for second going into the final 18 holes, slipped to a 1-over 73 and placed third, 13 strokes behind Ochoa.