Britney Spears has given her 16 year-old knocked up sister some seemingly good advice. She told her not to marry her baby’s father and end up like her.

Britney’s mom is said to have made sure that she didn’t hear about Jamie Lynn’s pregnancy before the press did because Britney has a big mouth and she was worried that the news would get out. That sounds like a legitimate concern considering that she’s dating a paparazzo:

“Whatever you do, do not get married! You are too young and you will ruin your life! Do not make a mistake and end up like me!”

That’s the shocking advice Britney Spears has given her little sister Jamie Lynn, who’s 16 and pregnant, the Enquirer has learned exclusively.

Now a single mom with two young boys, Britney is desperately worried about her sister’s future - and livid with her mother for keeping Jamie Lynn’s pregnancy a secret from her, sources say…

“Her mom Lynne didn’t tell [Britney] Jamie Lynn was expecting because she was afraid Britney would leak the news - or that she’d tell one of her friends who’d let the story get out.”

Frantic, Britney tracked Jamie Lynn down at Lynne’s home in Kentwood, LA - and the two sisters broke down in tears.

“When she got Jamie Lynn on the phone, Britney started to cry, and so did Jamie Lynn,” said the source.

“Britney told her ‘Do not marry Casey. Look at the position I’m in.’

“She told Jamie Lynn that she’ll always be there for her - and when she’s ‘had it’ with Lynne, Jamie Lynn can come live with her.”

[From The National Enquirer, print edition, January 7, 2008]

That’s ripe coming from Britney. It’s as if she blames Kevin for the fact that she can’t be bothered to spend time with her sons and/or hire a qualified nanny. She would be a lousy mom even if she was still married and at least the divorce helped Kevin step up to the plate, joint in hand or not.

Kevin is said to have also offered his support to Jamie Lynn. OK! Magazine reports that he thinks of her as a little sister and that “he just wants to be part of the support system.” He’s sure getting a lot of good press for a failed wannabe rapper that recently slept with Paris Hilton.

It seems like Jamie Lynn is going to have a troubled life whether she choses to get married or not. If she doesn’t want to end up like Britney she’s better off not talking to her much.

Header image is of Britney and Jamie Lynn together in October when a woman was harassing them. Thanks to WENN. Amazingly, there are no new photos of Britney today, but it’s still early. Give it a couple of hours.