Jamie Lynne Spears turned seventeen yesterday, and celebrated by going to the J.C. Penneys store. Wheee Ha!! Spears was spotted with her babydaddy/fiancé Casey Aldridge at a Mississippi JC Penney department store last night, sporting a baby bump-hiding baggy yellow sweatshirt . Casey was wearing a pair of sleek, up to the minute fashion boots and carrying a hot pink keychain.