J.crew creative director Jenna Lyons is sporting a new accessory: a bright white bandage on her finger, after a cooking accident. “I was making a salad and I was holding an avocado and the pit slipped and the knife ended up in my finger,” fashion queen Lyons told us while walking the red carpet at Woody Allen’s movie “Blue Jasmine” with her girlfriend, Courtney Crangi. She added, “I will recover. I’m totally fine . . . honestly, it’s good to mask it because then you don’t bang into it, because it’s painful.”