The "Bad Guy" singer broke the prestigious ... embellished tulle skirt and crystal harness. RELATED VIDEO: Billie Eilish Goes Gothic Glam in Sheer Lace Dress at 2023 Met Gala She paired the ...

In honor of Billie Eilish’s 23rd birthday, Dec. 18, look back at some of the most fascinating facts about the “bad guy” singer’s life—from her breakout album to Oscars history.