Photo by Billy Farrell/Patrick McMullan via Getty ImagesNicole Kidman may not be the most regular of Met Gala attendees (she’s only gone six times...so far). And while that may seem like a lot, for someone who has been in the public eye as long as Kidman, it’s pretty sparse. That being said, when the actor does attend, she does so with style and authority. On two of the occasions she’s walked the Met carpet, she not only cohosted, but was dresse…