Matthew McConaughey
He's more famous for being seen running on Malibu's beaches without his shirt on but Matthew McConaughey is also a big fan of motorcycle riding. Like some other celebrity riders, he's also helped do some charity work with his passion. Last fall he auctioned off his commemorative Texas Longhorn National Championship Tribute motorcycle, designed and custom-built by Ralph Randolph's Knockout Motorcycle Company to commemorate his alma mater's win at the 2006 Rose Bowl. Getty Images Feb 12th 2008 3:07PM
