Ummmm How Did I Not Know Billie Eilish Used to Have Pink Hair?!

Billie Eilish is famous for her 90s'-reminiscent, streetwear-inspired style, but it's really her hair that deserves the glory. From neon mullets to dusty pastel hues, Billie has proven time and again than she can effortlessly pull off any hair color – and she's not afraid to either.

Billie is ALWAYS switching it up – her latest look almost broke the internet. When she dyed her roots slime green, it propted a Twitter-wide debate about whether she was inspired by Jojo's Bizarre Adventure. No matter what her color, the singer has an uncanny ability to pull off even the wildest styles. Here's a look back at some of Billie's most iconic hair colors.

It's been a minute since Billie updated her, Jojo's Bizarre Adventure-inspired hairdo and as a result, she's going a bit blonde. Her dark hair is fading, revealing a light shade and tbh, the color really suits her.

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Most people would totally be afraid to dye their roots neon green, but Billie went for it and the look didn't disappoint. Though the haircut was an accident, she's been rocking the style ever since.

Billie showed off her deep blue streaks while she performed songs from her debut album, When We Fall Asleep, Where Do We Go?, at a venue in San Francisco.

Billie ditched the color and went for a jet black hue that she sported while attending the 2019 iHeart Radio Music Awards.

In 2018, Billie dyed her hair bright blue, even though she ended up regretting it. She told BuzzFeed, blue is her least favorite color. "Here's what’s annoying: I hate the color blue — it's my least favorite color. I don’t know how I ended up dying it blue," she explained. Billie also says it was really hard work to get rid of the color, which is probably how she ended up with the blue gray look.

Billie showed off her blue gray locks while out for a stroll in Paris. The hair color definitely called attention to her piercing blue eyes.

Blue may be Billie's least favorite color, but she just keeps killin' it again and again. She revealed a new iteration on her signature color while attending an event at the Yellow Ball in '18.

Only Billie can pair a lavender hair color with a lime green outfit and actually pull it off. That's exactly what she did while she performed at the Lollapalooza in 2019.

Billie pulled off these blue purple locks while she attended Sephora's House of Beauty VIP Party, back in 2018.

Wow, ok. Apparently Billie Eilish invented gray hair. The icy hue feels edgy and cool – so, basically perfect for her style.

Billie Eilish? In pink?! I never thought I'd see it. Keeping the whole vibe 100% unique, she complimented her rosey locks with a gold chain and matching gold leaf freckles.