[mannicken]

Not necessarily. Depression paralyzes you, leaves you too scared to leave the house or do anything.

"Stars" are more likely to be hypomanic. Or just people who like writing or composing music too much :) People like to blame success on mental disease or drugs because it helps them justify their laziness. Also, attempt to claim that Jimi Hendrix or Kurt Kobain wrote their music because they had a self-inferiority complex might be caused by the self-inferiority complex and envy :P