Reality temporary "stars"

On television, there are plenty of shows where a "reality television" aspect can be assessed... Most times, reality television shows introduce characters who have never appeared on television before. Consequentially, with the characters on the show not having any reputation as actors or anything of the like, it makes the action more believable. However, i do not think there is such a thing as a "professional RTV star." Anyone could jump on the set of "Jersey Shore" or "Survivor" and provide the world with entertainment.