High school musical 4 cast??

Ashley tisdale has recently expressed on  E! News that she will not be returning as sharpay evens in high school musical 4!!!!
She said “I honestly don’t think I would, I don’t know if I could fill her shoes again, I’ve matured so much, I just don’t know if I could give her justice — Sharpay — and be that character again. And I would hate to not have it be great.”