Billie Eilish Proves She's The Biggest Justin Bieber Stan in Throwback Pics

If you ever thought that you're the biggest Justin Bieber stan ever ... well, WRONG.

You know Billie Eilish. She is the incredibly talented, Grammy-winning, singer/songwriter that everyone can't get enough of. And if you're a fan of Billie's then you already know what a BIG fan of Justin Bieber she is — no one else could ever. And if you're a living, breathing person, then you probably already know that Justin just dropped his long-awaited new album Changes on Valentine's Day.

What could be a better V-Day present? Allow Billie to show you! The 18-year-old took to Instagram to support Bieber on his album release day, urging fans to "stream changes," along with several throwback photos definitively proving she is the world's biggest Belieber — seriously, in one picture, her door has a sign on it that says "Forever Belieber! Billie's Room." You cannot argue with that.

Another photo she shared is of her blonde self in a Justin Bieber tank top standing in front of a car. Maybe she was going to a concert of his? Or maybe she just decided she wanted the world to know who her fav is. Either way, I'm here for it because she looks SO HAPPY.

The rest of the photos show Billie's bedroom, which is covered in posters of Justin, beneath an absolutely wonderful boarder featuring galloping horses. This room is basically the Justin Bieber Museum.

In the post, Billie also shared a clip of an emotional interview Justin recently did around his new album release, during which he talks about Billie and her rise to fame. In the video he tearfully explains, "You know, let her do her thing and if she ever needs me, I'm gonna be here for her. But, yeah, just protecting those moments. Because, people take for granted encounters, and yeah. So, yeah. I just want to protect her, you know? I don't want her to lose it. I don't want her to go through anything I went through, I don't wish that upon anybody. So, if she ever needs me, I'm just a call away."

If you recall, Bieber hopped on a remix of Billie's hit "bad guy" last year, and they are obviously very supportive of each other.

Photos: Getty Images