Or is it?
Is there a typical teen?
For that matter is there a typical adult?
One problem with writing for teens when your teen years are a wee bit in the past, is that things do change and I find that things I liked or did as a teenager may not resonate with kids of today.
But that's okay. I have a teenager of my own. I can see what she likes and use that. Right?
My teen doesn't fit the above example of a typical teen. (Maybe no one really does). Her sport of choice is archery, she doesn't like to text - though she has plenty of chats with people on Facebook. She doesn't watch Glee, instead her favorite TV show is the Robin Hood series from the 1950s. (We have a few seasons on DVD). She does like to go to the mall with her friends, but she's not into buying clothes (they have a uniform at their public middle school, and that may play a part). She writes for fun (to the amusement of her classmates) and is never without a book.
And she has friends just like her. (Except maybe the Robin Hood TV series part).
Once a critique buddy questioned my use of a reference to a song from Grease in my story. She wondered perhaps if teen's today would know it.
I know my daughter would know it. She's seen three different live productions of Grease - and each time she's known people in them.
Pop culture for today's teens doesn't necessarily start the moment they're born. They can still experience things that pre-date them.
So don't worry that the teen you are writing doesn't look act like a 'typical' teen. That teen will be like someone. And that person will be delighted to find a character to relate to.