The ‘Hung Up’ singer recently took on the care of four-year-old Estere and Stelle – who were living in an orphanage in Malawi – and it seems they are settling into their new life well. Madonna posted a clip of the youngsters, wearing matching blue and white striped pyjamas singing nursery rhyme ‘Twinkle, Twinkle Little Star’ while accompanied by 11-year-old Mercy on piano.