I think this show does go for the lower end "stars." I think it ranks right up there with "The Surreal Life." Your not gonna see George Clooney, Brad Pitt, or Keira Knightley slumming it in a house with Flavor Flav or Brigitte Nielsen or doing the tango with Steve Guttenburg or Priscilla Presley.
As for Priscilla herself, her online bio states..."Actress, producer and entrepreneur Priscilla Presley starred in the Naked Gun films and the internationally popular television series Dallas, as well as guest-starred on TV's Touched by an Angel, Spin City and Melrose Place. Founder of Elvis Presley Enterprises, Priscilla has also served as executive producer on the feature film Finding Graceland and the television version of her autobiography, Elvis and Me. Presley was married to music icon, Elvis Presley.