Ad Rant: When celebs take up a cause, results can be painful [VIDEO]

Here at Ad Rant, we are so excited that Leo DiCaprio and Paris Hilton just took up some new causes. Leo's helping to save the tigers of the world, and Paris is, uh, entertaining the troops in her own special way.



A celebrity's name brings much-needed attention to worthwhile causes. What happens, though, when the cause brings unwanted attention boomeranging back on stars because the media start making fun of their commercials? For stars who are shopping for causes because it's so trendy to have one, here's our advice: Just remember the cautionary tale of Sally Struthers.