When you grow up with famous parents, movie sets, concert halls and red-carpet events can seem like the natural career course to take yourself - so it's not very surprising that many children of famous celebrities find themselves choosing careers in entertainment as they grow older.Building on the experience and careers of their parents, many celebrity children outshine their mothers and fathers, and become celebrities in their own right.Who are these celebrity children, and what are they up to today?And how many do you know, without even knowing it?