Billie Eilish has switched up her look again, this time debuting a brunette hairstyle on Instagram.

The 19-year-old pop star surprised fans and famous followers alike with the new look, which marks a departure from her signature platinum blond style.

Eilish teased the transformation with a closeup of her brown bangs on Instagram Stories, writing simply, “guess what.”

She then revealed the new look with a selfie captioned “Miss me?”, which received a lot of attention on the social media platform.

The brunette hair is a dramatic change from the platinum blond style Eilish has had since spring, and has caused many of her fans to speculate about the reason for the change.

Some have suggested that it could be a sign of a new era for the pop star, while others are simply excited to see her experimenting with a different look.

Fans of Eilish will remember that the singer shocked fans in March by ditching her trademark green roots for a blond dye job.

The new look was a long time coming, as Eilish revealed that she wore a Billie Eilish Halloween costume wig to hide her hair during the six-week dyeing process.

Eilish also revealed the reason for the color change, which also marked the start of her “Happier Than Ever” album era.

“I couldn’t go anywhere with that hair because it was so obviously me. I wanted anonymity,” Eilish told Elle of going blond and bidding goodbye to her neon roots.

Despite rocking green locks for several years, Eilish has also sported shades ranging from blue to purple in the past.

“I had no goal of ‘This is going to make everybody think differently of me,’” she said.

“The other day, I posted a video from when I had green hair, and I saw people go, ‘I miss this Billie, the green-haired Billie.’ I’m still the same person. I’m not just different Barbies with different heads.”

Eilish’s fans are also used to her style switch-ups, she broke the internet by trading her trademark green roots for the blond dye job in March; her Instagram photo of the look received a record-setting 1 million likes in six minutes.

Eilish’s fans are known for their loyalty and are eagerly waiting for her to make any new moves, but the brunette hair is a surprising move.

Many fans are also excited to see how Eilish will incorporate the new look into her music videos and stage performances.

Eilish’s hair color change can be seen as a nod to her music career, but it could also be a personal decision.

Whatever the reason for the change, fans are excited to see what the future holds for the young artist, who continues to push boundaries and surprise fans with her ever-evolving style.

This new hairstyle of Billie Eilish is yet another example of her constantly evolving style, which keeps her fans engaged and excited.

It will be interesting to see how she incorporates this new look into her music and performances in the future.