1. an abnormal need for daily candid photos being taken and posted to the internet; 2. an obsession of attention from the media wherever a person goes or is; 3. a condition whereby a person purposefully goes to, or places themselves at, locations where it is known that cameras will be waiting (Ivy, Sunset Blvd. Starbucks); 4. an uncontrollable desire to be photographed and published thus justifying and validating a person's importance, attractiveness, overall fame and ability to be the center of attention 24/7.
Britney Spears and Paris Hilton have paparexxia. The celebs that show up at known paparazzi hangouts just to get their pix taken are paparexxics. Even when a celeb has big troubles (Britney's custody, Kiefer Sutherland DUI) you will see recent paparazzi pics of them in the midst of the trouble, a sign of paparexxia. The starlet with paparexxia couldn't stay home and was obsessed with going to clubs on the Sunset Strip in LA, knowing that her picture would be taken and likely show up in the media.