Guinness Book of World Records

Fitness met 3D street art this week in London when the artist team of Joe and Max snagged the Guinness World Record for the largest and longest 3D street artwork. The piece is a partnership with Reebok CrossFit designed to look like passersby are hovering over snow-covered cliffs dangling over a steep waterfall.

The painting measures 12,490 square feet of London public space and required seven days to complete. For a behind-the-scenes look at the process of creating a record breaking painting check out Reebok's video after the break.

Now this is big. Aevin Dugas, 36, a social worker from New Orleans, has just been named the 2012 Guinness World Record holder for largest afro, which measures four feet by four inches in circumference. While Dugas gets her hair trimmed about three times a year, it's taken her 12 years to grow it out to its current length. Though she admits her voluminous hair can cause problems now and then, she loves her hair — as she should, because she wears it beautifully.

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Chris "The Dutchess" Walton was recently named the Guinness World Records 2012 holder for longest set of fingernails in the world, with nails that reach over 10 feet long on her left hand and nine-and-a-half-feet long on her right hand. It's taken her 18 years to grow her impressive set, but Walton says that she'll eventually cut them. "I'll do it, but I just can't see it in my head. I'm so used to them now that they feel like a body part," she told reporters at the Guinness announcement in New York. Want to see Walton's nails in action and hear what activity she finds hardest (you'll never guess)? Then just keep reading.

Today is the second annual Social Media Day, and we're not exactly sure the proper way to celebrate. Comment on all our friends' Facebook statuses? Check in on Foursquare to every business within a block's radius of our office? Try to beat Charlie Sheen in fastest to reach 1 million Twitter followers? All right, the last one will be tricky since Charlie already holds the Guinness World Record for that statistic.

Keeper of global achievements, Guinness World Records released a list of impressive social media records in honor of today's festivities. Here are some of our favorites:

• The most likes on a Facebook page goes to Facebook itself! Over 47 million users have clicked the thumbs up button on Facebook's Facebook page. Maybe it has a slight advantage.
• The most disliked video on YouTube is Justin Bieber's "Baby" music video. Hey — that song is rather catchy! Don't worry Beliebers, the video is also the site's most viewed with over 575 million views.
• YouTube's most liked video is Judson Laipply's "Evolution of Dance," which has over 750,000 likes.

Keep reading for more world records.