slight vibration and excessive tire noise
 

I drive a 98 xk8 with 67000 miles. I have noticed of late that I feel somewhat of a vibration and or tire noise at lower speeds. Today when I was turning a corner I heard a funny sound coming from the rear of the car.I am hoping it is not my rear end? Miles seem to low to have a rear end problem. Does anyone have a thought as to what this might be

Thank you