egoqueaf

(n) any bloated-ego celebrity who changes the name of his or her public persona

or

(v) the act of changing your name for career reasons

Sean "Puffy" or "P. Diddy" or "Diddy" or "whatever-the-hell-his-name-is" Combs is such an egoqueaf.

'Lil Bow Wow just egoqueafed to just "Bow Wow."