I'm pretty sure this is fake and I'm feeling a little discouraged at the moment

I've looked around at some Mary-Kate autographs on the net and most say "Mary Kate O--" or "MK O--" in nice handwriting not whatever this is with a weird smiley face. I just feel like some random person read my letter and signed it. I'm pretty sure it went to the set though because the return address said 'Shapiro Levine Productions LLC' and I didn't write LLC on the envelope I sent.
sent: 8/15/07
rcv'd: 8/20/07
"The Wackness"
Shapiro Levine Productions
609 Greenwich St. 4th Floor
New York, NY 10014
I found the address on the NYC Mayor's Office of Film
