Blake Lively just made it fashionable for even a celebrity to be their own curator. (Watch the video below.)The “Shallows” star was checking out the open-since-April “Crown to Couture” exhibit in Kensington Palace when she noticed that her 2022 Met Gala gown needed some adjusting on the mannequin.Perhaps security wasn’t expecting the changes to be quite so DIY. Lively entered the normally forbidden space to make the alterations herself.“When you’re the clown who hops over the rope at the museum to fix the exhibit,” she wrote with the Instagram story video she shared Tuesday.The ensemble now immortalized in the royal setting is the Versace Atelier gown and Lorraine Schwartz-designed crown and earrings worn by Lively at the 2022 Met Gala, perhaps fashion’s biggest night.“I still feel like a...