1. Miley Cyrus: Hannah Montana
For years, Miley Cyrus' fictional alter ego was Disney character Miley Stewart, who had a very famous alter ego of her own: the blond-wigged Hannah Montana. The songbird with a double life was a marketing dream come true: They could sell both Miley and Hannah products! Millions of dollars later, Miley tried to distance herself from Hannah's family friendly image with risqué clothing and onstage stripper poles.