Jamie Lynn is officially The Single Spears Sister again after dumping ex-fiancee and baby daddy Casey Aldridge three months after reigniting their fizzled romance at a Lady Gaga concert.

“Jamie Lynn got fed up with Casey’s immature behavior. She thought he’d changed – that’s why she got back together with him. But he’s still the same old guy,” an informant tells Star Magazine.

The young couple first made headlines in 2007 when the former Zoey 101 actress, 19, became pregnant with Casey Aldridge’s child. Jamie Lynn gave birth to their daughter, Maddie, the following June. The couple announced plans to wed before calling off the engagement and splitting earlier this year.

Written by Castina on November 11th, 2010 | Tagged as: Casey Aldridge,Jamie-Lynn Spears