Jamie Lynn Spears, enjoyed her 17th birthday relaxing with fiancé and father of her baby, Casey Aldridge, OK reports.

Jamie Lynn and Casey spent most Friday in his hometown of Gloster, Miss., a short drive from the Spears family home in Kentwood, La. Sources tell OK! the teen lovers stayed indoors for most of the big day, emerging later that evening only to make a quick shopping trip to a Wal-Mart supercenter in McComb, where they spent about an hour inside the store.

"Jamie Lynn looked super happy and kept smiling inside the Wal-Mart," one shopper tells OK!.