What about the celebrities themselves? A study in the USA tried to measure narcissism or extreme self-centredness, when feelings of worthlessness and invisibility are compensated for by turning into the opposite: excessive showing off. Researchers looked at 200 celebrities, 200 young adults with Masters in Business Administration (a group known for being narcissistic) and a nationally representative sample using the same questionnaire. As was expected, the celebrities were significantly more narcissistic than the MBAs and both groups were a lot more narcissistic than the general population.