03 PT Popping Noises

Just recently, as in the past 2-3 days, I've noticed a popping noise when making left or right turns, and it only pops once and at random times. It doesn't happen everytime, but it happens enough that I notice it. Also, I've noticed a humming noise that vibrates my floorboard in the front, but it only occurs when the engine is still cold.

From some other forums I'v read, it sounds like the inner/outer CV joints are going bad. Would this be anyone else's opinion as well? The car has 48,500+ miles on it, and I've never had these replaced.