Pick up any modern pop record. Some are worse than others, but all are auto tuned.

Just Google worst auto-tune for examples, because it's so common now, most people don't notice it. Here's a list of some examples:

http://www.hometracked.com/2008/02/05/auto-tune-abuse-in-pop...

Also, if you're not really musical you might have a hard time picking it out. I found that as soon as I learnt an instrument, songs suddenly became layered and I could pick out and distinguish different instruments, and notice mistakes.