Veteran actor Robert Redford has slammed Hollywood stars who resort to plastic surgery to look younger, insisting people are "obsessed" with holding onto their youth. The 71-year-old is happy to age naturally and cannot understand why people choose to go under the knife to maintain their looks. He says, "I keep thinking, and I mean this when I say it, when do we get past this? I can't speak for Europe but certainly in my country (the U.S.), there's an obsession with youth. People trying to stay young and facelifting and all that, which I haven't done."