Ochoa won the $1 million Samsung World Championship for the second year in a row, collecting her seventh victory on the LPGA Tour this year, a $250,000 winner's check increasing her lead on the money list and a convincing closing round of 66 that increased her edge on the rest of her peers.

Ochoa's 18-under total of 270 added up to a four-shot victory over Mi Hyun Kim, who birdied the last two holes for a 69.

And Ochoa's victory paid off in another way, guaranteeing Ochoa a second consecutive player-of-the-year award.

"It was my day, it was meant to be," she said. "It was one of those days you see things clearly and get in a good rhythm. A great day."

Ochoa said she set her goals high this year and wasn't sure she would be able to win more than the six times she did in 2006.

"I thought it would be hard to improve, but here I am."

Once again, Ochoa made it look easy, even at the troubling 18th hole, where she had nerve- racking problems keeping the ball on the fairway Thursday and Saturday.

This time, she stashed her driver, split the fairway with a five-wood, calmly rolled in her putt for par and then saluted the fans that gathered at the side of the green and waved a Mexican flag. It was another banner day for Ochoa and the end of a dominating week. She had at least a share of the lead since the second round.

When she rolled in a 15-putt to birdie the 538-yard par-five 15th hole, her advantage was four shots, but if there's anything that Ochoa has proven, she has held the advantage for a while now.

The 25-year-old from Guadalajara, Mexico, who supplanted Annika Sorenstam as the No. 1-ranked player in April, has been both consistent and efficient, especially in her last 13 tournaments — six victories, three seconds and two thirds.

Ochoa had seven birdies and one bogey, after she missed her only green, leaving it short at the 150-yard par-three 16th.

She hit a 6-iron to five feet at the first and made the putt for a birdie and also birdied the par-five third, two-putting from 25 feet. Ochoa reached 15 under when she hit a 6-iron to six feet and made birdie at the eighth, but knew that Jeong Jang had holed a bunker shot at the same hole to join her at 15 under.

So when Ochoa hit an 8-iron to four feet to birdie the 10th, she took the lead for good.

"That really changed everything," said Ochoa, who hit 82 percent of the fairways and 82 percent of the greens all week.

Kim said she wished she hit the ball as far as Ochoa.

"I want to ask her, I want to get 10 yards of distance from her. She looks like she's not big or strong, but she hits it so far. You know, every good long hitter, they don't have a good short game, but Lorena, she is still young, but mental is good and she hits it long, she hits good putts. She has a lot of good things. I'm jealous."

Ochoa said she's not going to share her distance with Kim.

"I like her, but no."

Tied for the lead with Suzann Pettersen when the round began , Ochoa beat Pettersen by six shots. Pettersen, who defeated Ochoa last week in a playoff, shot 72 and fell to fifth.