Hayley Williams of Paramore would be good, so would Ashley Tisdale and Rihanna. Even Paula Deanda and Aly & A.J. would be good too. I also wouldn't mind seeing Serj Tankian either.
I'm gonna go a bit off the board and add some more. Stephanie McIntosh, Rachel Farris, Hayden Panettiere, Stacie Orrico, Madonna, Paul McCartney (I'm not kidding), Jonathan Davis of KoRn or Anna Nalick.
