Doesn’t seem like Britney Spears would like Blake Lively to play her in her biopic! On Saturday, August 10, the pop star, 42, seemingly shaded Lively — who wore a custom 2002 Versace dress formerly worn by Spears to the It Ends With Us premiere — by saying her short version is “better” than the original. “Updated version of my 2002 Versace dress!!! I Like it way better… Shows my legs!!!” she wrote alongside a video of herself in a blue and pink bejeweled mini dress. The celeb whipped her blonde locks back and forth as she showed off her form of the look. The clip came after Lively announced sh…