i think lady gaga. :D
Oprah Winfrey Audrey Hepburn Lady Gaga Ellen DeGeneres Beyonce
probably Oprah Winfrey, abnoxious though she is Perhaps you meant who in which case Lady Gaga is at or near the top.
it's lady gaga if you want a proof you can read it in gaganews.com
Oprah Winfrey goes by O, Deepak Oprah (a sendup of Deepak Chopra, a self-help guru), and Lady O.
Lady GaGa
Lady GaGa
lady gaga
lady gaga
Lady Gaga
Lady Gaga.
Lady gaga