A 20-year-old Instagram star died after being found in critical condition on a billionaire's superyacht in Greece. Australian Sinead McNamara, who was working on the six-storey $140 million boat, was found on Thursday on the island of Kefalonia where it was docked, according to the BBC. She died while being airlifted to hospital in Athens. The circumstances of her death remain unclear, and Greek authorities have reportedly launched an investigation while the coast guard has ordered the yacht to remain docked at the port of Argostoli. Authorities told The Times that McNamara was found by a crew member hanging on the ... (full story)