I watched the video, and the first thing that hit me was the Uncanny Valley, especially the expression on the face. The dancing was ok, but it can be improved by adjusting the morphs, so it would be more lifelike (gravity of the boobs etc.). Little things that makes a difference. So technically she could improve, so I sent a YT-mail giving some advice (in a good-spirited way!). I said I hoped my message doesn’t discourage her, and there are people she could get help from if she needs it. It really doesn’t matter as long as she’s got guts to post the videos online.
You know, Wendy, you could get some royalty-free lyrics and record your singing w/music. Sort of circumventing copyright infringement, avoiding it altogether. No doubt the trolls will flag you, but really, you shouldn’t give a **** about their comments. As long as it makes you happy, then all is good. If I’d get a lot of bad comments on my renders at Flickr, should I care about them? (unless there are technical stuff that might improve my works, that’s critic that I take to heart) But so far, I get few comments, so I’m not in the loop.