Jaime Lynne Spears will be a Single Mom

Britney Spears' pregnant sister Jamie Lynn has split from her boyfriend.Jamie, who revealed she is 12 weeks pregnant (rumored to be having a spring baby) with her first baby with childhood sweetheart Casey Aldridge, is now seemingly single.Yesterday, Casey, 17, set his mood to 'Blah' on social networkingsite MySpace and changed his status to "Me and Jamie are over :(".Jamie, who stars as a schoolgirl in hit Nickelodeon TV show 'Zoey 101',revealed she was "scared" to tell her parents she is expecting a baby.She said: "I took two weeks to myself where I didn't tell anybody. Only oneof my friends knew because I needed to work out what I would do for myselfbefore I let anyone's opinion affect my decision."Then I told my parents and my friends. I was scared, but I had to do whatwas right for me. My mom was very upset because it wasn't what she expectedat all. A week after, she had time to cope with it and became verysupportive."Jamie's father, also called Jamie, is said to have been left "devastated" bythe announcement.A source close to the Spears family told Us Weekly magazine: "Jamie isdevastated by the news. He is extremely depressed and feels Jamie Lynn hasruined her life."It has also been claimed Britney's ex-husband Kevin Federline found outabout the pregnancy before the 'Toxic' singer so he could be prepared forthe "fallout".The source added: "Kevin knew before Britney that Jamie Lynn is pregnant. Infact, Britney's mom Lynne, told Kevin about it on Monday, because Lynnewanted Kevin to be prepared when Britney found out." He's such a stoner, that's why Brit's boys might be tested positive for the drug in their system.