Unraveling the Hidden World of Billie Eilish: 7 Facts You Didn't Know About the Grammy-Winning Pop Star

1. Billie's real full name is Billie Eilish Pirate Baird O'Connell.

2. Billie's first song, "Ocean Eyes," was written by her brother Finneas and originally meant for his band.

3. Billie's unique fashion sense, which often involves baggy clothing, is a deliberate choice to avoid body shaming and to focus on her music.

4. Billie has synesthesia, a condition where senses overlap and she perceives certain sounds as colors.

5. Billie's musical influences include Green Day, The Beatles, and Tyler, The Creator.

6. Billie's music has been praised for addressing mental health and personal struggles, which she has been open about in interviews.

7. Billie is a vegan and has been an advocate for animal rights since a young age.