Olivia Rodrigo is a rising star, who just released a chart-topping album; but aside from her music, the singer is also known for her luscious long brown hair.

During her Wired Autocomplete interview, one of the most commonly searched information about the "Vampire" singer is what shampoo she uses.

"It's called Good Hair Day," Rodrigo replied. "Someone gave it to me once and I just went with it, rolling with it."

According to Buzzing Pop, a new account on X (formerly known as Twitter), the shampoo is from Temple Spa and is now sold out.

Fans were shocked upon finding out that the shampoo the "Good 4 U" singer uses is now unavailable on websites.

"Having this much impact early on in your career is insane,' a fan wrote.

"The prettiest hair of music industry," another added, with a video clip of Rodrigo's hair.

"I mean, have you seen Olivia's hair?"

"Olivia should start a beauty brand OMG."

Olivia Rodrigo's Long Luscious Hair

Apparently, this is not the first time people have noticed the "Driver's License" singer's long brown hair, in fact, there are several articles about it.

Rodrigo's hair is a part of her entire style and aesthetic, and as per Allure, it has always been this way.

The singer prefers keeping her hair long, and framing her face, and is the perfect accessory to all her Y2K looks, the magazine added.

Fans also joked about how Rodrigo must be feeling now that her fandom bought all the stocks of her favorite shampoo.

"Imagine Olivia having her 1st bad hair day in years because Livies sold out her shampoo."

"How she's suppose [sic] to wash her hair now???"

READ MORE: Olivia Rodrigo's MTV VMAs Performance Scares, Surprises Audience, Sparks Debate Among Netizens: 'She's An Actress!'

Olivia Rodrigo's New Album Scores Big

The massive demand to know more about Rodrigo comes shortly after the release of her highly anticipated sophomore album, "GUTS."

According to reports, the album has peaked at No. 1 on the Billboard Hot 100, following the success of its predecessor, "Sour," the singer's debut album released in 2021.

"GUTS" has produced three singles as of this writing, "Vampire," "Bad Idea Right," and "Get Him Back."

On top of that, Rodrigo just announced her very first world tour in support of her album and will be performing 75 shows across North America and Europe.

As of this writing, there is no word on whether the "Deja Vu" singer will bring the "GUTS" world tour to South America, Asia, and Australia.

READ ALSO: Olvia Rodrigo Reflects On 'Trauma' of Fame Following Hit Album 'GUTS': 'I Feel So Lucky But It's Really Difficult'

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