Rule #1:  Babies born unto celebrities are not themselves celebrities.

Rule #2:  It is not "news" when a celebrity gives birth to a new baby.  This is a normal occurance that happens everyday to hundreds of thousands of ordinary couples.  The fact that it happened to someone who (arguably) sings does not make it "newsworthy".

Rule #3:  Britney Spears and Kevin Federline are no longer celebrities.