Will someone PLEASE tell me why Jamie Lynn Spears has registered for gifts at Babies R Us? Did I miss the day she lost all of her money and applied for welfare? And while you’re at it, explain to me why she seems to think getting married at 17 is a good idea. Spears, who turns 17 on April 4, drove 80 miles to Baton Rouge from her home at the Serenity mansion in Kentwood, La… Reportedly flashing an engagement ring on her left...