metallic sqeaking sound

i started having this sound some time ago, when it was cold out, after the first start of the day pulling out of the driveway (driving straight) it got this metallic sqealing sound, but im not sure where its at, because it used to happen so rarely. today i drove about 50 miles on the highway, and when i got off and started driving in the city it started making that sound when taking off, or slowing down somtimes. but doesnt have anything to do with the steering. or brakes. and does it only while cold or hot it seems. im totally lost here..thanks in advance
 
sorry, its an auto. the sound only occurs after i get off the highway. or when i first start driving (straight line) in the morning. when just city driving i dont normally hear it. but lately i have. i havent had it on the highway for a few months, and when i did this noise (that only occured when the car was cold from overnight) started happening then too.
 
I would reply same as "twogts4us" did. My midpipe is loose now from the heat/cool cycyle and its banging against my body causing squeeking sounds whenever i take off most of the time. EkkkK Since yours is stock im not sure ;l