I love Tania Bass dresses! Typically they aren't "overdone" though. When I saw this dress, with all the stones and everything I thought "Adam's Family"....and in that case - PERFECT! LOL.... I think black is fine on little ones depending on the music.
Here's another stoning option that I've done before - if you want to put a lot of crystals on the dress, use colored ones! They don't make the dress shine like a Tiffany Store (great analogy, whoever said that) but it does add dimension. My favorite color stone.....BLACK! It's great, i've used them on black and red dresses, and black dresses.
FYI....if you use swarovski crystals on this dress, and you want to do this stoning pattern, consider just the neck or perhaps a row or two just down the middle. It will make it look more elegant and less cluttered, not to mention less expensive! You can clutter the stones on the back - that always looks nice too.
Good luck and happy stoning! LOL