Squealing sound

Hey guys, I was hoping someone could help me out with this. I'm getting a squealing sound coming from the drive belt/pulley area of the engine and I'm not sure whats causing it. I tried spraying belt dressing on the belt and the tension is good...it will stop momentarily but then start again when I get the car moving. Could it be a bad bearing/pulley? Any help would be appreciated, thanks!

Sounds like something is about to seize. I'd pull the belt and turn each accessory by hand. Pay special attention to water pump.