It's a long walk to the top of the world.
But once you get there you'll find that you're all alone.

-Continued...

I had this exact thought etched in my mind the other day when I posted but I thought about how you could take it both ways, or maybe both ways mean the same thing really.
Being at the top of the world as in stardom and being rich and famous isn't really all it's cut out to be. Everyone idolizes you and would like nothing more than to get to meet you and have you sign your name on a piece of paper, as if your handwriting were any better than theirs. They don't look at you as a regular human being, therefore friendship is hard to find amongst "peasants" (not that non-famous people are inferior to famous people). But let's face it, there's no way britney spears is going to hang out with a bunch of her fans because it would be so awkward for her to be sitting around with a bunch of people who worship the ground she walks on and expect an authentic friendship out of them.
At the same time, literally being at the top of the world (which would be mount everest) is a very lonely place because there's nobody else up there. So even though you've worked so hard to get to climb this mountain, you might have a few people along with you for support but in the end you really have no one that you're close to. Sure, these people followed you up to the top of a mountain, but as soon as you climb down it you probably won't be too close with those same people because for all you know, they were just in it for the ride.
I don't know if that makes sense or not, but it makes perfect sense to me.