[custom_adv] He was shot in the head by unidentified men after midnight on Saturday and left in a critical condition, reports said. Mr Tatlises, 58, had just left the offices of private Turkish channel Beyaz TV with his spokeswoman, who was also hit. [custom_adv] They were both taken to hospital and underwent surgery. The singer, known as Emperor and one of Turkey's biggest stars, had just left a TV studio shortly after midnight, and was about to leave by car when he was attacked. [custom_adv] According to media reports, the gunmen, carrying Kalashnikov rifles, escaped in a car. No group has yet claimed involvement in the attack, although newspapers said Mr Tatlises had been shot in the leg in 1990 and had escaped unharmed in another incident in 1998. [custom_adv] Doctors treating him at Maslak Acibadem hospital said a bullet had entered the rear of his skull and had passed out through the front, Anatolia news agency reported. [custom_adv] Drums were beaten, pipes played, and people danced in the streets of Istanbul on Sunday, as the singer Ibrahim Tatlises, a megastar in Turkey and much of the Middle East and Central Asia, made his first public appearance since being shot in the head by a hit squad three months ago. [custom_adv] Clad in a white shirt and cap and appearing to walk unaided, Mr. Tatlises, 59, emerged onto the rooftop terrace of a rehabilitation clinic in the Maltepe neighborhood of Istanbul, waving to the fans who had gathered in the street below to wish him well on Father’s Day.