Temp. squeek?

[KingpinSVT]

I have a squeek coming from the right rear. It last maybe 20-30 seconds of low speed driving if its been sitting, and its gone if its been driven. Over 20ish MPH it goes away. It goes away under braking. It gets worse the colder it is outside.

Could that be a wheel bearing or should I begin elsewhere? The squeek increases with speed a bit, but not like I would think for a wheel bearing. It gets worse until about 7-10 MPH until the squeek remains constant for a few seconds, then if you get to about 15-20 it just goes away and generally wont come back until the car sits for an hour or so.

I also find it a bit strange that braking makes it go away. Any ideas?

[Tony2005]

Brake pads, rotors or calipers.