"I'm Not that Girl" is a song from the musical "Wicked", sung by Elphaba Thropp, who plays which future character?
I'm Not that Girl:  It is a solo sung by the main character of the show, Elphaba Thropp (the future Wicked Witch of the West in "The Wonderful Wizard of Oz") in the first act and Glinda in the reprise in the second act.
i don't know