I just don't see how you coudl have possibly seen enough of her acting abilities on her AI snippets of singing that would make anyone sound so certain that she'd be perfect for this role OR tracy.
That's not to say that it's okay to say she'd suck at it or anything, but saying that she'd be great is like...how do you justify that? When did she ever show the quirkiness, character acting, or comedic abilities to tackle either role that makes you think she'd be 'great', as some say, in either role? Saying she was great in West Side Story is odd to me as justification becuase vocally AND acting-wise it's a complete 180 from what Tracy or Penny requires in Hairspray. If she was great in WSS, then it's cool to say "I saw her and the girl can act, I wouldn't be surprised if she was good at this" but...I'm just really baffled that people really think "wow, she'll be so great" - why do you think that? how could you possibly know?
I say if it happens, it'll be a big shot for her to show what she's capable of, or to knock herself out of a possible musical theatre career if she tanks because she's trying to do too much to soon.
I don't think Hairspray is in need of ticket sales that they'd pull in the stunt casting of a big name, plus she's not all THAT big of a name at all - if they offered it to her, I'd trust that she earned it in hte audition process. I've seen several different casts of Hairspray and never disliked it yet, I think they do a fine job casting that show.
This could be the exception, but til she's up on that stage, y'can't really know...
If I show you the darkness I hold inside, will you bring me to light?