Lisa Lavie and Terra Naomi both started on youtube, they're both very talented.
I look at youtube and observe a similar phenomena to that I see on programs like Pop Idol, America's/Britain's Got Talent - talentless singers who have never been told the truth, their stupid parents have told them they're the next Whitney Houston and no one has ever done them the favour of disabusing them of this notion and giving them a healthy dose of reality. It's the same on youtube, look at the comments and singers with an average voice, singers with a terrible voice are told they're incredible, to keep on with what they're doing and fame is sure to come, its only the occasional comment that tells the truth and then out goes the stupid cry of 'hater'. People could stick to honesty and do everyone a favour, the world wouldn't be half as fucked up as it was if people weren't under the delusion they can be anything/do anything/they're the most special person in the world.