MICHEL MARTIN, BYLINE: Love songs are so important. Think about all the songs that have been the soundtrack to your relationships. (SOUNDBITE OF SONG, "I HONESTLY LOVE YOU") OLIVIA NEWTON-JOHN: ...

The universal language of music has united generations of lovers since the beginning of time. Falling in and out of love, grasping at unrequited love, mourning love lost and succumbing to deep love ...

The timeless ballad sounded effortless, but its journey to becoming a worldwide hit was anything but.

Add Yahoo as a preferred source to see more of our stories on Google. “I don't think there’s any exhaustion point,” she’s explained to CBS News. “There’s only so many notes, right? And so many words.