She's more like moving around to make things more interesting for us than dancing though~
BoA can dance, but not exactly keep the original complicated dance and sing without lipsynching properly I heard.
Namie's the true dancing+singing queen, flawless almost, even with a song like Put' Em' Up and no simplifed dance moves. She once mentioned in an interview that "There's definately people who sing better than me, and people who dance better than me, but for someone who can do both, I want to be the best out there."
Sorry going kinda going OT though
