Fame is fickle and, according to pop culture magazine Radar, changes by the second. The magazine's constantly updated Fame-O-Meter (www.radar online.com/hijinks) is an "absurdly scientific" process that tabulates the number of times a notable's name appears in print. Compare and contrast the daily fame index of everyone from Barack Obama and Rudy Giuliani to Johnny Depp, Tyra Banks and Jessica Alba.

