You don't have to be a teenager to dress like one...that is, if you're under sixty. Sorry Mammer (I used to have a friend who called her grandma Mammer...it made me laugh).
Cardinal rule in wearing clothing meant for teenagers-
1. As long as your boob and/or hiney isn't hanging out, you're fine.
2. Be wary of message tees. You don't want to be a thirtysomething prancing around town in a T-shirt advertising that you pooped at the mall today. That's just poor form.
It's tropical chic, age appropriate, and at $39.50, you won't have to blow your entire allowance on it.
p.s. Next time you hit the ladies room at the mall, keep it to yourself Mammer.
*Keepin' it PG-13,