Oh baby, baby: Britney Spears' sister pregnant at 16

Britney Spears' 16-year-old sister Jamie Lynn, who stars as a schoolgirl in Nickelodeon's popular US TV show Zoey 101, is pregnant.Sources say the teen did not tell Britney the news before it was made public in an interview with an American magazine. A Britney friend said: "This is going to kill her. In the end, she'll be supportive, but this is a big shock."A high school student who lives in Louisiana, Jamie Lynn Spears reportedly met the father, Casey Aldridge, the son of a Tennessee papermill worker, at church.Jamie Lynn told the US edition of OK! magazine: "It was a shock for both of us, so unexpected. I was in complete and total shock and so was he. "As soon as I found out for sure from the doctor, I took two weeks to myself where I didn't tell anybody."Only one of my friends knew because I needed to work out what I would do for myself before I let anyone's opinion affect my decision. Then I told my parents and my friends. I was scared, but I had to do what was right for me."Her mother Lynne Spears says: "I didn't believe it because Jamie Lynn's always been so conscientious. She's never late for her curfew. I was in shock. I mean, this is my 16-year-old baby."Lynne was set to pen a parenting book about raising her famous daughters, but it has now been put on hold indefinately.Meanwhile, Nickelodeon said in a statement: "We respect Jamie Lynn's decision to take responsibility in this sensitive and personal situation. We know this is a very difficult time for her and her family, and our primary concern right now is for Jamie Lynn's well being." Her big sister, Britney may not be the best source of parenting advice.The 26-year-old pop star lost primary custody of her two sons, aged 2 and 1, to ex-husband Kevin Federline after their divorce last year and is engaged in a bitter custody battle that has shone a harsh spotlight on her maternal shortcomings.Zoey 101, which wrapped production on its fourth and final season in September, revolves around a headstrong student at a co-ed boarding school in California.