Britney Spears' 'Slave 4 U' Music Video Director Shares On-Set Secret (Exclusive)

Director Francis Lawrence chats with ET's Ash Crossan about Britney Spears' 'I'm a Slave 4 U' and 'The Hunger Games: The Ballad of Songbirds and Snakes.' The filmmaker offers a behind-the-scenes secret about filming the Princess of Pop's iconic 2001 music video. Alongside producer Nina Jacobson, Francis also confirms there's plenty of Katniss Everdeen-themed Easter eggs in the new prequel, which stars Rachel Zegler, Viola Davis, Peter Dinklage and Jason Schwartzman. 'The Hunger Games: The Ballad of Songbirds and Snakes' flies into theaters on Nov. 17.