Here are 2 story ideas.
Scenario A:Oprah gets into a catfight with 2 other celebs like Joan Collins or Paris Hilton
Scenario B:A diva match doesn't go as planned
As for the Oprah idea she would kick both old Joan's and young Paris's asses at the same time, with enough energy left over to take on someone else.
My first choice would be to see Oprah AND Collins do a number on Hilton...
... and, after Hilton's done-for and bound, Collins turns on Oprah !