Britney Spears (L) and her husband Kevin Federline attend the worldwide premiere of Warner Brothers "Charlie and the Chocolate Factory" at the Grauman's Chinese theatre in Hollywood on July 10, 2005. [The film is based on the novel by Roald Dahl and tells the story of kids who win a tour of the Willy Wonka chocolate factory. It opens in the United States on July 15, 2005. ]