Britney Spears is giving fans a rare glimpse at her family life.The 39-year-old surprised her millions of Instagram followers by posting a new photo with her kids, Sean Preston Federline, 16, and Jayden James Federline, 15. Though the pop star ended up deleting the pictures shortly after, Britney was all-smiles as she wrapped her arms around her sons at the Van Gogh art exhibition in Los Angeles.