Blake Lively wowed on the red carpet at the premiere of her film "It Ends With Us" in a vintage Versace gown that Britney Spears previously wore.  Lively shared her excitement about wearing Spears' actual gown, calling it a "stroke of luck." The multicolored, sparkly gown paid homage to Spears and her character as floral shop owner Lily Bloom. Blake has been rockin’ eye-catching floral prints, including floral leather chaps by Stella McCartney, which she paired with a rust-colored spaghetti-strap Tory Burch tank top without a bra. Lively is glad that method dressing is a thing now. She recalled dressing in suits to help promote A Simple Favor, saying, “It's a marketing hack to try to get people to pay attention to our movie. And it worked.”  If you dressed as a character, which movie or T.V. character would it be?