Ahead, see 20 of our favorite Billie Eilish fashion moments ... Again taking inspiration from the musician's iconic lime green roots, this monochromatic Valentino look is as ready for the street ...

Whether it's her iconic eye-rolls ... to honor the Happier Than Ever singer in true Gen Z fashion—by diving into the 15 best Billie Eilish memes that the internet has gifted us.

Billie Eilish/Instagram Billie Eilish had plenty of reasons to be festive this holiday season. The “Birds of a Feather” singer turned 23 on Dec. 18, just days before Christmas, and compiled ...