Squeaking noise when accelerating from first gear

[JaeTee]

Hi, it's only been happening recently and I've tried to google some answers but I can't get a straight answer...So here's how it usually goes:

I always warm up my car for at least 5 minutes before driving it if it's been sitting idle for a considerable amount of time. As I put her into first gear and start to accelerate from the friction/balancing point of the clutch I start to hear a squeaking sound. I doubt it's the brakes since I'm not braking at all...unless the brakes still "hold" the car in place when it's coming from idle? I used to hear it also in second gear but that has disappeared...It only seems to happen when I get into first gear and only when I drive her for the first time of the day. After driving for the first time of the day it behaves normally and I have yet to hear the noise again until the next day when I have to go to work/school in the morning.

Any thoughts?