Red Hot Chili Peppers frontman Anthony Kiedis turns 50 but looks a decade younger

Anthony Kiedis turns the big 5-0 on 1 November but he looks much younger than his years and, even better, much younger than most of his famous peers.

What better time to take a peek at same-age celebrities who look wildly different. Some have been drinking from the fountain of youth, while others are losing their battle with aging. Click through the gallery to see Megan Fox, Eminem, Sarah Jessica Parker and Chris Rock with their same-age counterparts...