Should I try to contact her?

I have not posted on tuscl in a good while but had something on my mind and wanted some advice. Lately I have become friends with a few dancers on Facebook. The First one no longer dances but I was able to become friends with her after becoming friends with her brother who graduated with me. The second dancer is actually my current favorite. I decided to ask her this past weekend, because I got tired of chancing it on whether she would be working a particular weekend or not( I don't like calling clubs for a dancer). Well she said yes, and I was able to become friends with her.

Furthermore, as you know dancers keep in touch with the other girls they work with. While browsing my current favorite's page I discovered that she is friends with a old favorite that left the club a year ago. I never got a chance to say goodbye to that dancer because I took a 4 month hiatus from the club and upon my return I was told that she had moved away. So now I am wondering should I send her a friends request or message? I am skeptical because she will know that I located her through either dancer A or Dancer B since she uses her real name on the profile and it is set to private(seems like they all do.)

For those that don't know much about Facebook you can see if your friends or friends with people you know. If she accepted my request she would see that I am also friends with the other two girls. I just don't really know how she would react, she may think that the other two girls gave out her information to me.

I am leaning towards just not doing anything and letting it go. What do you think?