Jamie Lynn Spears is living it up — shopping, hanging out with her friends and behaving like any other normal teenage girl, OK reports.

"She has such a level head on her. She is handling this situation with a maturity that is surprising even her own family," a friend of the Zoey 101 star tells OK!.

"She's behaving like a pretty normal teen," the friend says. "She's not even worried about how much weight she puts on or doing any special exercises. At her age, her body will bounce right back and she knows it."