Rancho Mirage, CA (My Sportsbook) - Song-Hee Kim shot four-under 68 Friday to grab a one-stroke lead at the halfway point of the Kraft Nabisco Championship.

Kim, who is winless on the LPGA Tour, completed 36 holes at seven-under-par 137. She leads a trio of major champions by a single stroke.

Women's world No. 1 Lorena Ochoa carded a two-under 70. After standing alone in second after the opening round, Ochoa shares second place with former Women's British Open champion Karen Stupples (69) and former U.S. Women's Open champ Cristie Kerr (67).

Karrie Webb, a two-time winner of this event, managed a two-under 70 and she was joined in fifth place by Stacy Lewis (68). They completed two rounds at five-under-par 139.

First-round leader Suzann Pettersen struggled to a one-over 73, which dropped her into a share of seventh place with 2008 McDonald's LPGA Champion Yani Tseng (71) at minus-four.

Kim started on the 10th tee and collected her first birdie on her second hole. After three straight pars, Kim converted her second birdie effort on the par- four 15th.

Trailing by one, Kim birdied the par-five 18th, her ninth, to make the turn at minus-six on the Dinah Shore Tournament Course at Mission Hills Country Club.

Kim moved in front with a birdie on the par-five second. She closed with seven consecutive pars. Kim completed the first 36 holes with eight birdies and just one bogey.

"I had a great round today, and my swing was really smooth and comfortable, and I was also putting great today," Kim said. "I always think about the fairway and greens, not the pin. I know this course is really tough, so I never try to make hard decisions."

The 21-year-old has owned at least of piece of the 36-hole lead twice before on the LPGA Tour. Kim finished fourth and 10th in those two events.

Stupples, the 2004 Women's British Open champ, opened with birdies on 10 and 11. She posted two bogeys and three birdies the rest of the way to end at six- under.

Ochoa also started on the back nine and birdied the 11th. She stumbled to bogeys on 13 and 18 to turn in three-under.

The 2008 winner flew up the leaderboard with three birdies in the first five holes of the front nine. That gave her a share of the lead, but Ochoa faltered to a bogey on the eighth. She atoned for that mistake with a birdie on No. 9.

"It was a good day today. I started a bit slow and made a couple of mistakes, and then was able to bounce back and made a few birdies, but I'll take my two- under for sure," Ochoa stated. "I like to give myself a chance to win the tournament on Sunday and everything is going in the right direction."

Kerr, playing in the afternoon wave opposite Kim, had a steady start with a birdie and seven pars over the first eight holes. She flew into a share of the lead as she birdied nine and 10, before making eagle on the par-five 11th.

The 12-time winner on the LPGA Tour stumbled to bogeys on the 14th and 15th to fall three behind Kim. Kerr fought back with birdies on 16 and 18 to share second place at minus-six.

"I played great on the front nine. I had some putts that could have gone in, but I bombed the driver all day today," said Kerr. "It gave me a huge advantage on some of the holes, where if you could get shorter clubs in, you could stop it a little bit better on the greens."

Sakura Yokomine (71) is alone in ninth place at three-under-par 141.

Michelle Wie posted her second straight 71 and is among three players tied at minus-two. She was joined there by Sandra Gal (70) and amateur Jennifer Song (71). Song is the low amateur through two rounds.

Defending champion Brittany Lincicome struggled to a two-over 74 to slide into a share of 19th at even-par 144.

NOTES: The cut line fell at six-over-par 150 with 79 players moving on to the weekend...Among those missing the cut were Natalie Gulbis, two-time winner Juli Inkster, Ai Miyazato, who won the first two events of the season, Meg Mallon, Christina Kim and Laura Diaz...Four of the seven amateurs that started made the cut...Joining Song in the final two rounds will be Alexis Thompson, Jennifer Johnson and Jessica Korda.