Facebook Hidden Cameras?

I’m pretty sure facebook has hidden cameras everywhere. I’m sitting at work this morning, listening to Imogen Heap on our CD player (NOT on the computer media player) and the next thing I know, there’s a new ad on the side of my facebook page that says, “Like Imogen Heap? Check out (insert some band name here that I can’t remember.)” And then when that CD was over, it switched over to the next one, Missy Higgins. And what do you know, about 3 songs in, I go back to look at something on facebook, and there, in the same place the Imogen Heap ad was, appeared a new one that read, “Like Missy Higgins? Check out (insert some other band name here that I can’t remember.)” I’m now a few songs into a Bebo Norman CD, so if this happens with him, I will be very suspicious.