^ No, she has had good vocal performances for sure but I don't say all of them are lip synched or back tracked.
Even in these news clips I said Evolution sounds very good but I do not suspect that one of being lip synched. There is just certain evidence from what we have seen and heard from Sparkle that points to it not being completely live and therefore I'm not going to say "oh she sounded so great in Sparkle" or something like that.