The Hills Universe: Who's Who on TV's Hottest Show

Who? Audrina Patridge, LC's replacement BFF and roommate. Discovered lying by the pool of her apartment complex by Hills mastermind Adam DiVello while he was location scouting, Patridge was introduced to Conrad's crew and quickly became a member of the entourage.
Occupation: Receptionist at Epic Records; aspiring actress
Hills Role: Asks LC what she did last night, provides blank stare in response
Defining Hills Moment: Her argument with then-boyfriend Justin Bobby next to a dumpster outside club Opera in Season 3 was an all-too-real moment in a series whose "reality" is routinely questioned.