Billie Eilish “felt like a damn failure” aged just 12 because she didn’t have a career. The 22-year-old star – who won the Best Original Song Oscar for ballad ‘What Was I Made For?’ from ‘Barbie’ at Sunday’s (10.03.24) ceremony in Hollywood – has recalled feeling like she was “never going to amount to anything” when she saw ‘Matilda the Musical’ on Broadway as a child. She told press in the winner’s room: “I remember being 12, believe it or not, and seeing this musical and sobbing my eyes out and thinking ‘damn I’m a failure’. I was watching Matilda on Broadway, it was amazing. “I was balling,…