I heard that Ayu has never lip synch, is that true?

[PrismaticTears]

Namie's got skills though and you can tell she sings live since her voice will fluctuate when she jumps up and down or does a sudden move that changes her breathing.

Overall I don't particularly care who does it, just saying that they do, I know that they can and will sing well on a good day. Now if they're a talentless tramp like some other 'artists' (parishiltonwtf) then I'm somewhat bugged.