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Mom-to-be JAMIE LYNN SPEARS is getting ready for baby! The 16-year-old little sis of BRITNEY was seen registering for her upcoming baby shower at a Babies 'R' Us store in Baton Rouge, LA Thursday, OK first reported. The expected due date according to the registry? July 10, 2008!

On her little wish list? Everything from a $759 Bugaboo FROG Stroller and a Cookie Monster Bath Towel to a variety of Baby Einstein products! 

Jamie Lynn and dad-to-be CASEY ALDRIDGE also left a message on their registry to friends and family, thanking them for all of the support during their special time. News of her surprising pregnancy first broke in December.