You can try but very, very slim chance that she would ever respond, so don't hold your breath. Like the other person said, you could try checking Twitter. Remember, she probably gets thousands of hits per day on there; she might possibly see yours. Or you can do some research, find out what talent agency she is represented by, call them to confirm, ask if you can send a letter. A real letter, on paper with an envelope & a stamp! Make sure it is short and totally clean and decent. Still, very slim chance she would ever respond, unless you thought of something cool & interesting to say. If you tell her that "you like her" that's gonna creep her out & she won't write back.