Ever since Kate Walsh made her first appearance as Dr. Addison Shephard on “Grey’s Anatomy,” I’ve kind of liked her. But she totally won me over with the sushi dress she wore on “The Tonight Show” last night. Apparently, it’s her homage to Lady Gaga‘s cheap, stinky meat dress. Only Kate’s version is made of sustainable fish. And there’s even a little tuna roll ring. Cute!