I'm from the UK. Oprah has zero presence here. I know who she is, but no-one else my age does.
The most famous woman in the world HAS to be either Queen Elizabeth II or Catherine Middleton. Any other answer is pure delusion. EVERYONE knows who they are.
Everybody, young and old, knows who Lady Gaga and Madonna are, as far as musicians go.
Everybody knows who Marilyn Monroe is, as far as actresses go.
