Britney Spears is clapping back at Millie Bobby Brown after she floated the possibility of playing her in a biopic. “I hear about people wanting to do movies about my life … dude I’m not dead!!!” Spears wrote this in a social media caption. On an episode of The Drew Barrymore Show, Brown answered a question about who she would most like to play. “I think for me, [it] would be Britney Spears,” she responded. The actor known for her role in Stranger Things added that “when I look at pictures of her, I feel like I could tell her story in the right way and hers only.” This controversy is confusing…