Cameron Diaz & John Mayer Dating?

Diaz, 34, and Mayer, 29, have known each other for years, but it has been rumored that they have taken their friendship to the next level. The two were spotted out in New York City last night looking pretty cozy according to sources. A source told US Magazine, "They went out to several places…It was the two of them, getting to know each other, out on the town." A source close to Diaz said, "This was technically not their first time hanging out…they've hung out together with friends before. But this was the first time together like this. It's new and developing…but they really like each other and it went well."

Diaz is currently in New York filming the comedy What Happens In Vegas. She was most recently romantically linked to Mindfreak star Criss Angel. The two reportedly dated briefly but things got weird when his wife came forward and accused Angel of having an affair with Diaz. Before that she dated singer Justin Timberlake for almost four years before the couple called it quits in January. Diaz's rep reportedly had no comment on her relationship with Mayer.

Just recently it was reported that Mayer was dating singer/actress Mandy Moore. The couple were spotted having lunch together recently and at the New York premiere of her newest film Dedication she was asked if the two were involved in a romance. Moore said, "Oh my goodness. John and I have been friends for years, no romance." Mayer was most recently linked to singer Jessica Simpson. The two were reportedly seeing each other off and on over the past year and officially split a few months ago. Mayer's rep said, "We do not comment on our client's personal lives."