PATTAYA (AFP) - Mexican golfing star Lorena Ochoa clinched the 1.45-million-dollar Honda LPGA Thailand tournament Sunday with an impressive six-under-par 66 round that included seven birdies. The world number one started the tournament slowly Thursday, but powered up the leaderboard with low scores throughout the weekend to finish on 274, a three-stroke lead on second-placed South Korean Park Hee-Young. Ochoa, who with 24 tour victories under her belt has become the woman to beat on the LPGA circuit, wins 217,500 dollars in prize money. "I started the morning with good practice today (Sunday)," she said. "It will be a good memory for me. My goal was to win the tournament. Here I am with the trophy and I am very pleased. I played especially well." Park managed a seven-under-par 65 on Sunday, with a bogey-free round that included an eagle and five birdies. "Last year, I felt that I was very far from her level of play. Today I feel I am getting closer to Ochoa," the South Korean said. "I will go back to the hotel and have a party. I am very happy," she added. In third place was Paula Creamer with 278. The American had a healthy lead Saturday, but her final one-over-par 73 round was marred by three bogeys. Gaining ground Sunday was Stacy Prammanasudh, an American of Thai descent, who carded a nine-under-par 63 after three average days. Her final day's performance included nine birdies and her total 281 score left her in fourth place. "I made couple of sizable putts. It was unexpected for me as it was for everybody else. I am very pleased and hopefully I will continue with this kind of form next week," she said. Prammanasudh was joined in fourth place by Brittany Lang of the United States, who led on the second day of the tournament but slipped over the weekend, carding a one-over-par 73 Sunday. The tournament was held at the Siam Country Club's 72-par Plantation Course in the Thai beach resort of Pattaya. Suzann Pettersen of Norway won the previous Honda LPGA Thailand tournament, in October 2007.