Happy Birthday, Sandra! See Who Else Looks Fab at 50

They're how old? From Courteney to Lenny, see which stars make beating the clock look amazing

ROB LOWE

"When I was a teen idol, I was so goddamn pretty I wouldn't have taken myself seriously," the Parks and Recreation star told PEOPLE of his youth. But this eternal hunk has still got it – even if he insists that's not what matters. "The candles on the cake mean absolutely nothing," he said about turning 50. "It truly is about how you lead your life and not how much life is led."