About.com: Companies Ditch Celebrity Endorsements
Beyonce: robot got
to her pants too
Brands are starting to tell their A-list celebrity spokespeople, "This ad's not big enough for the both of us." Pepsi got rid of Britney and Beyonce (in favor of a pants-eating robot vacuum cleaner, which I don't really get). And Chrysler, in a merciful move to TV watchers everywhere, pulled the sparkplug on Celine after the crooner's ads helped sales of her album but not the car.
Online ads have been generally more celebrity-free due to endorsement contracts that made production costs uselessly prohibitive.