Take notice if it squeaks under slight brake pedal pressure. If it doesn't, then it's the brakes.
I'll be going in this Friday for round 3 of my brake squeak saga.
. First time they greased the anti-rattle clips. That lasted for a hundred miles. 2nd time they installed an updated pads that have a larger anti-rattle clip. That lasted about 2k miles. Friday, they are replacing the calipers and pads to an updated set. We'll see how that goes. While some people may find something like this frustrating, I have to say that my dealer has been awesome. I know when I go there, they're going to try something to fix it.