Pop music super star Madonna celebrated her 59th birthday with her children in Italy

She tweeted a family photo Saturday showing her with all six of her kids -- Lourdes, 20, Rocco, 17, David, 11, Mercy James, 11, and 4 1/2-year-old twins, Estere and Stella. People magazine said this is the first time the Grammy winner has shared a picture of everyone together.