Squeal is caused by vibration
* Cooked brakes (resulting in temporary uneven wear, or glazed discs/pads)
* Something is loose allowing the pad to move and rattle
You can try bedding in. On a young car like yours the pads will be in good shape still unless you've driven it extremely hard. I'm presuming that you haven't changed the pads and the pads we are talking about are standard.