Billie Eilish had some choice words for tech billionaire Elon Musk. Earlier this month, Musk, 54, won a shareholder vote that would give the Tesla CEO stock worth US$1 trillion if he hits certain performance targets over the next decade. More than 75 per cent of voters approved the plan as shareholders gathered for the annual meeting.Following the reports, Eilish, 23, took to her Instagram stories on Nov. 13 and referred to Musk, who is already the richest person in the world, as a "f-ing pathetic p-- b-- coward.