Jeremy Piven and John Cusack have been best friends for as long as either can remember -- but now, says Piven, Cusack doesn't like that Piven's become at least as famous (if not more so) than he has, and there might be a rift in their longtime relationship. Piven told Best Life magazine, "You start getting into trouble in life when you start comparing and contrasting your life to anyone else's," and gave a sharp "no comment" when asked about how Cusack has handled Piven's success on "Entourage" and elsewhere.