Actor Jason Lee appears in the 1999 film 'Mumford.' Mr. Lee skateboards in his free time. Gemma Lamana/Touchstone Pictures/Newscom/File
Actor Christian Slater appears in the 1989 film 'Gleaming the Cube.' Many professional skaters credit this film with inspiring them to try skateboarding. Rank/Newscom/File
Actor Owen Wilson rides on a skateboard. Mr. Wilson did not do his own stunts in the Girl Skateboards company's 'Yeah Right' video production, codirected by Spike Jonze. London Enterntainment/Splash News/Newscom/File
Comedian Dave Chappelle takes his son skateboarding in New York in 2008. Mr. Chappelle has said that his hobbies are playing videogames and skateboarding. Tommy Meinelt-Jackson Lee/Splash News/Newscom/File
Professional skater Tony Hawk catches some air in his exhibition in Barcelona, Spain, as part of his European skateboarding tour in 2010. Guillem Lopez/Newscom/File
Reality television star Tila Tequila rides a skateboard during a photo shoot in Santa Monica, Calif., in 2008. Tom Vicker/Splach News/Newscom
After being presented with a skateboard, singer Pink shows off her skateboarding skills on 'The Ellen DeGeneres Show' in 2003. Wenn/Newscom/File
Actress Kate Hudson plays with a skateboard on the set of 'Something Borrowed' in New York in 2010. Jason Webber/Splash News/Newscom/File
Actor Matthew Settle of 'Gossip Girl' fame rides a skateboard as he leaves Bar Pitti in the West Village in New York in 2009.
British Prime Minister Edward Heath rides a skateboard in 1966. Chris Smith/Newscom/File
An Obama administration adviser said Sunday that the United States will not recognize a March 16 referendum in Crimea if it leads to the region's annexation into Russia. The comments further clarify statements made by President Obama Thursday, which claimed that the vote would "violate international law."