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(Yahoo!) - Remember when 40-years-old used to be considered over-the-hill? But today, rapper Eminem, who turns 40 Wednesday, has 61 million "likes" on Facebook. He was the most popular person on the social networking site until recently, when Rihanna took the lead spot. Not bad.

Hip-hop may be a young guy's sport, but the "Lose Yourself" rapper is still in demand. It's been two years since he released his last album, Recovery, and his fans eagerly anticipate the release of his still-untitled eighth album, due out in 2013.

Em, born Marshall Mathers, has confirmed to multiple radio personalities that he has begun working on his next set. In a June interview with DJ Whoo Kid, he said that his mentor Dr. Dre would be involved with the project.

"I usually get going and kind of start going a certain direction and just record what I'm feeling," Em explained. "Then I'll go see Dre and fill in some of those pieces." Producer No I.D. confirmed in an interview with MTV in September, that he has also been in talks to work on Em's forthcoming effort.

Eminem's social relevance transcends appealing solely to the hip-hop audience. In 2011, car manufacturer Chrysler tapped the Detroit rapper for a successful advertising campaign. In the commercial, Em was simply shown driving past his hometown's landmarks.

Chrysler recently announced its plans to release a special Eminem brand of the Chrysler 200 sedan. The 8 Mile edition,commemorating the 10th anniversary of Em's theatrical debut, is planned for a 2014 release.

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