There are 4 original elements of hip hop. bboying, mcing (rapping), djing, and graffiti art.
Despite what the media and a lot of people think, bboying is the only form of dance in hip hop, then popping and locking were adopted elements to it. So if theres no popping, locking, or breaking, then its not hip hop. Britney Spears is not hip hop, thats what i would call street jazz. As far as music goes if there is rapping or djing then it is considered hip hop. And graffiti art is the use of spray cans and markers to design words and characters of your own and are usually done illigally on walls and buildings.
There are four elements fo hip hop