I know that phrase. It seems so obvious now. But I was so attached to the wrong answer because my first though sounded so good SevFlynn. Seven. It was like, two options and I never even considered the alternative. This is why I love brainteasers.
Well... he was world famous before our time... but part of the fun of this game is to stump players. Sometimes you can solve for X by looking at the context of the phrase and working it backwards... (hint, hint)