She actually has a pretty decent voice for a 12-year-old. It says a lot about the music industry right now that talent is swept under the rug in exchange for pumping out auto-tunes.
It also says a lot about people that there are so many making fun of a 12-year-old (or 13 in Rebecca Black's case) girl for singing. If you hate them so much, stop sending their videos around to all your friends, stop listening to it yourself, and stop talking about it all the time. Some people put more energy into hating these girls than I put into liking my favorite bands. If you don't like it, the best thing to do is just ignore it and it will eventually go away. Before posting this, many of the people in this thread had not heard the song, now there are almost 200 comments which seems like the video now has several more views. Giving them more YouTube hits only makes the videos seem popular, which just means that talent will continue to get tossed aside. But that would be too easy, wouldn't it?