Is it normal to message someone on facebook and tell her you admire her?

So about two and a half years ago, I went to a musical theatre camp for teens at a university. There was this amazing counselor, who was honestly the most beautiful and talented woman I've ever met. She was a musical theatre major at the college. I didn't really talk to her much, since I wasn't in her group of campers. However, one night she told me I had a very pretty singing voice. That gave me a lot of confidence. I haven't seen her since that summer but we're friends on Facebook and I check her page a lot. I just look at her pictures from shows she has been in. She really inspires me a lot and has given me an amazing amount of self-confidence. She even inspired me to change my physical appearance for the better and take better care of myself. Here's the dilemma though. Should I message her on Facebook letting her know what I think about her and how she inspires me? I don't know if she really even remembers me. I would love to tell her, but I don't want to seem weird or stalkerish. I am 7 years younger than her, so do you think she would enjoy hearing what a great role model she is and would it flatter her? Also, if I do message her, what should I say?