Billie Eilish has been rocking bold hair since the start of her career.
In 2018 — just two years after releasing her first song "Ocean Eyes" — Eilish sported long, gray strands at Nylon's Young Hollywood party.
Her blue hair in 2018 remains one of her brightest looks to date.
She wore the color in long, straight strands with a middle part — her signature style at the time.
She's worn a few variations of the bright hair color.
Months after debuting her green hair, Eilish changed the style so that the green only covered her roots.
Some fans took issue with Eilish making the color her signature and said on Instagram that they felt it was time to change it up.
But the "Bad Guy" musician stood by her hair-color choice.
"It's called not being depressed anymore pls just be happy for me," Eilish responded to the social-media comment. "This is the longest I've had the same hair color since I was 13 & that's on mental stability and growth leave me alone lsjdkksjdjs."
Eilish debuted a blonde bob in 2021 but later revealed she wasn't happy with the color.
Speaking with Elle in September 2021, Eilish said she chose the color because she "couldn't go anywhere" with her green roots.
"I wanted anonymity," she told the publication. "I went to a park with a friend, and I was like, 'No, I can't take off my hood!' I was terrified of the paparazzi and these stalkers I've had. But my friend was like, 'Don't worry. You're OK. Nothing's gonna happen.' And I took my hood off, and I felt like a new person."
But despite the freedom she originally felt, Eilish later said the color wasn't the best choice for her.
"I feel sexier when I dress masculine. I didn't feel sexy for one second of being blonde," she told Highsnobiety during a 2022 interview. "When I was blonde, people treated me differently. People completely changed their demeanor."
But as of this month, Eilish has brought back her colorful strands.
Eilish's new red roots were on display when she performed at Lollapalooza in Chicago, Illinois, at the start of the month.
She also shared a photo of her hairstyle on Instagram with the caption, "remember me?" — seemingly commenting on her former bold hairstyles.
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