Yeah. "Heartless"... which is another cover that uses Auto-Tune in the actual song.
But as far as their original songs...
Not only do they not have auto-tune on these but the guy can actually sing. If the guy had a horrible voice and used auto-tune to mask that I would understand why people would backlash. He probably just prefers to sing auto-tune for the pop cover songs to make it sound like the original or "cause it's fun" or whatever.
But yeah the talking w/ auto-tune is pretty annoying and pointless.