Tiger Woods` girlfriend cheating on him?

Los Angeles: Golfer Tiger Woods` girlfriend Lindsey Vonn, ski champ, has reportedly been caught cheating on him.

Vonn was spotted locking lips with a mysterious man backstage during Justin Timberlake and Jay Z concert in Miami Aug 16, reports radaronline.com. "After the concert was over, Lindsey and a group of female friends, carrying drinks, made their way backstage, and Lindsey spotted a guy she very obviously knew well," a source told US tabloid, The National Enquirer. "She threw herself into his arms and they started on a long session of deep kissing that went on for several minutes. He was a tall, good-looking man, in his mid-40s, with graying temples. "They were really going at it. They were both holding drinks, and Lindsey’s free hand was around his neck, drawing him closer, while his hand was gripping her rear end," the source added. IANS