Pregnant Jamie Lynn Spears Turns 17 on a Budget

Pregnant Jamie Lynn Spears turned her 17th birthday bash into a bargain affair, dining with fiancé Casey Aldridge at chain diner Ruby Tuesday and then shopping at superstore Wal-Mart.

The couple were spotted in Liberty, Mississippi, close to where Aldridge and his family live, on Saturday.During a trip to discount superstore Wal-Mart, Spears was spotted looking at sleeping bags, suggesting the couple is planning a camping tripSpears' big sister Britney celebrated her sibling's birthday with a family dinner in Brentwood, Los Angeles.

The pop star joined parents Lynne and Jamie and brother Bryan for a meal at Italian restaurant Ristorante Peppone.