Happily ever after is what movies are made of. But offscreen, lasting love can be as elusive in Hollywood as a face without Botox.

Somehow, in the thick of all the scandal, breakups and drama, there are celebrity couples who survive in spite of adversity. And we bow down before them, pedestalize them, revere them. They're a rare, mystical species, the Holy Grail of Hollywood. As such, they are often hunted down and scrutinized in the hopes that their secret to staying together will be revealed.