ATHENS, Greece (AP) — Greek singer Demis Roussos, whose often high-pitched pop serenades won him household recognition in the 1970s and 1980s across Europe and beyond and who sold more than 60 million records, has died in Athens at the age of 68, a hospital confirmed Monday. For many an iconic presence with a colorful dress sense — Roussos was once dubbed the Kaftan King — and rotund, bearded appearance, he enjoyed the respect of his colleagues and a steady global following. In 1985, Roussos was among 153 people taken hostage when two Shiite Muslim militiamen hijacked a TWA Boeing 727 on a flight from Athens to Rome, and he spent his 39th birthday on the plane.