2006 Pontiac G6 humming noise in front end

I just replaced the wheel bearings and hubs in front end of my car.
The humming noise went away about 70 percent but there is still a humming noise going on.
The mechanic says it is the tires. They are wearing unevenly. Is this a correct evaluation or can it be something else. I can not see any visual wearing of the tire unless it is minute and I know nothing about cars.
Do you think it may be tirods or cv joints instad of the tires?
I had the car aligned when I got the bearings done and the car still bears to the right.