I, personally think, (& don't quote me on this, cause I'm honestly not 100% sure), but I don't believe she has a real one. I think there was some magazine artikel that came out not too lon ago, where she laughed & berkata she was behind the ball because she doesn't twitter.. but again, I could be wrong. I'm going to try 'n find the artikel to make sure I'm not just imagining things for you.. lol!
.. But I think that Jamie has a real one though, doesn't he..?? :-/