Last night, towards the end of my commute home, I noticed a strange sound coming from the front of my bike. I wasn't until I was outside of my apartment building, that the sound was coming from the headset. It's a squeaky noise that happens when I turn the handlebars left and right.

This morning it went away, but after an evening ride, the squeaky sound came back. What could possibly be causing this noise? My bike is only two months old with only about 300 miles on it.