Lindsey Vonn
Lindsey Vonn allegedly cheated on Tiger Woods Tumblr

Tiger Woods and girlfriend Lindsey Vonn may be headed toward a split, as reports surface that the world-famous alpine skier cheated on the professional golfer. Woods confirmed his relationship with Vonn on Facebook in mid-March, but just a few weeks ago, Vonn was allegedly seen being intimate with another man.

She attended a Jay Z and Justin Timberlake concert in Miami on Aug. 18, and while backstage, the 28-year-old made out with an older man who was part of the tour, according to reports. “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 tells 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.”

In March, Woods announced on Facebook that he and Vonn were official, saying, "This season has been great so far and I'm happy with my wins at Torrey and Doral. Something nice that's happened off the course was meeting Lindsey Vonn. Lindsey and I have been friends for some time, but over the last few months we have become very close and are now dating.

We thank you for your support and for respecting our privacy. We want to continue our relationship, privately, as an ordinary couple and continue to compete as athletes,” he continued.

Woods was previously married to model Elin Nordegren. They divorced in 2010 after Woods admitted to cheating on her with more than 10 women.