Quite a few came to mind all at once. I can't just choose one. And lets be honest, some of these don't give blondes a good name at all, or help eliminate some of the blonde stereotypes! :
Pamela Anderson
Paris Hilton
Jessica Simpson
Marilyn Monroe
Jenny McCarthy
Britney Spears
Heidi Montag
Tori Spelling
Reese Witherspoon
Madonna