After battling substance-abuse problems on and off for more than 30 years, Melanie Griffith says the "monster" has been contained. "Addiction's a tough enemy to defeat," the Oscar-nominated actress tells Spain's ¡Hola! magazine in a new interview. "I think of it as a monster. If I feed it, it will always want more and more, so now I'm letting it starve to death in a corner.