Tina Fey

The '30 Rock' creator veers between thinking she is incredibly talented to having impostor syndrome.

Tina, 53, said: "Ah, the impostor syndrome!? The beauty of the impostor syndrome is you vacillate between extreme egomania, and a complete feeling of, 'I'm a fraud! Oh god, they're on to me! I'm a fraud! So you just try to ride the egomania when it comes and enjoy it, and then slide through the idea of fraud."