The world's current Sith Lord
Her current apprentices are possibly Dr Phil or that white designer he-bitch she owns, or perhaps even Tom Cruise (hehe midget)
"Watch out or Oprah will fry you with her sith powers"
"Oprah is so Sithy she eats bricks for breakfast (which also explains her weight)"
"Oprah is going to take over the galaxy one day, better not pay out black folks"