Find Out Who Attended Billie Eilish's 21st Birthday Party!

It’s Billie Eilish‘s big day! The “You Should See Me in a Crown” singer turned 21 on Sunday (December 18), and she just celebrated in style along with her boyfriend Jesse Rutherford, as well as a bunch of celebrity friends and family. Billie was joined by family, including brother Finneas, and her boyfriend onstage at [...]