I assume she can't commit to a theater project that runs through May given the fact she is gonna have to do lots of promotion, do the talk show circuit, and premieres for the SEX & THE CITY movie.
"Some people can thrive and bloom living life in a living room, that's perfect for some people of one hundred and five. But I at least gotta try, when I think of all the sights that I gotta see, all the places I gotta play, all the things that I gotta be at"