That is a great website. More and more it makes it possible for a poor musician to preform a song, and after altering it using this technology, release it and it may become a hit. My kids have been quite disappointed that many of the songs they enjoy sound like crap when played live on TV. The musicians are just not that talented, but somehow they can release a quality song. Now we may know why.
I've had that same experience with my kids. In fact I have taken some small amount of pleasure in pointing out to them the subtle queues that tell you someone's voice has been heavily post-processed. You hear it a lot on R&B tracks these days. Few of the younger stars can really cut it in a live performance. But with software like Celemony's we may come to a point where you just can't tell the difference any longer.