Madonna posted a photo of her 'house rules' in an Instagram story on Sunday, March 19, showing a board with her five non-negotiable rules written on it. "1. Smile, 2. Be Happy, 3. Listen to Others, 4. Speak Kindness, 5. Be Happy with What You Have," read the poster displayed by the pop singer. The 'Material Girl' star has twin daughters Estere and Stella, 10, Mercy James, 17, David, 17, Lourdes, 26, and Rocco, 22.