Do the popular people who peak in high school fail in life? Any stories?

[Slient_Love]

Okay. I'm just wondering about this situation because it feels like every time I go on facebook and twitter it seems that the popular girls from middle school are still very much popular. I remember people telling me who were older than me that in high school it wouldn't matter, and that was pretty much a lie. Because I wasn't popular, I was on the bottom and would get jokes made out of me. People told me that I annoyed them(not to my face of course) only because I would never change my looks or the way I acted.
I'm just wondering "Do the popular girls who have nasty attitudes" every fall off or do they keep going and become successful in life? But the thing is all they do is copy off of homework, cheat, and do drugs or claim they do drugs and have sex. Most of the nasty ones either have tattoo or a nose ring.

But for the other popular girls which are the very few and rare nice ones, "one of them" were actually my friend. She's actually a model. Will people like her be successful in life? I mean I remember all the time in Middle School she would get straight A's and she would always be on some type of new diet plan. Then, when high school hit she looked absolutely beautiful and were still making the grades, but was just having a hard time keeping up because she had so many auditions to go to. But her attitude was still nice and true unlike the others.

Then there's me. The one that kind of changed, but still haven't changed yet. I still don't talk to a lot of people, and I'm still at the bottom kind of. But no one teases me or anything like that at all. Except when I try to talk to one of my friends on face book or twitter than the mean girls come in who used to pick on me in the 9th grade. I'm into a lot of different stuff like I play the piano, love to write songs/stories/poetry. I get good grades, and my G.P.A. is going back up

What really happens to us after high school?
I already seen what happened to my cousin and she was the popular nasty one in high school. Things didn't work out to well for her and she's struggling.
Why do they say the one's who peak in high school are the ones who fail later in life? Is this true or no?
Oh and just so you know I'm 17 and is a Junior in high school. I know I shouldn't worry about this but I keep having bad flashbacks about getting teased a lot in school. Even in elementary I was picked on since, I got there and it only stopped a little.