Bam Margera

If Johnny Knoxville was the ringmaster of the "Jackass" (MTV, 2000-2002) crew, and Jason "Wee Man" Acuña its court jester, then Bam Margera was its matinee idol and its entrepreneur. An inveterate prankster as a teenager, Margera filmed his friends as they executed skateboard stunts and practical jokes, and later released them as part of a popular video series called "CKY." The videos helped to introduce Margera to Knoxville and the "Jackass" team, who made him their second-in-command for the eventual series and wildly popular feature films. Between "Jackass" projects, Margera became a one-man operation, producing his own prank reality series, "Viva La Bam" (MTV, 2003-05) and several follow-ups, as well as directing music videos and low-budget comedies and launching his own radio program and music label.