Billie Eilish says she once ordered 70 boxes of Froot Loops by accident because she doesn't know 'what things cost'

• Billie Eilish recently told Vanity Fair that she doesn't know "what things cost."
• "I've never been an adult before," she explained. "And, you know, I grew up with no money."
• "I tried to order one box of Froot Loops and I was like, 'Oh yeah, sure. It's $35.' I didn't know that that's expensive."

Billie Eilish says she accidentally ordered 70 mini boxes of Froot Loops during quarantine because she assumed one would cost $35.

"I don't know what things cost because I've never been an adult before," she said in her new cover story for Vanity Fair. "And, you know, I grew up with no money."

The "Bad Guy" singer and her older brother, Finneas, were raised in a Los Angeles suburb and homeschooled by their parents: Maggie Baird, who worked mostly as a teacher, and Patrick O'Connell, who was a construction worker for Mattel. Both are also credited with roles in regional theater productions and voice-over work.

Eilish skyrocketed to fame at 13 years old when her debut single, "Ocean Eyes," went viral in late 2015. She signed to Darkroom/Interscope shortly after and sold nearly 4 million units of her debut album - which is to say, she has spent her entire young adulthood wealthy.

Read more: 14 records Billie Eilish has already broken

"It's a really weird position I'm in," Eilish told Vanity Fair of her new online shopping habit.

"I feel kind of stupid because I'm like, I don't know how much Froot Loops are. I tried to order one box of Froot Loops and I was like, 'Oh yeah, sure. It's $35.' I didn't know that that's expensive."

She added: "I ordered 70 boxes."

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Eilish landed at No. 43 on the Forbes 30 Under 30 Class of 2019, with a reported net worth of $53 million.

According to the magazine, she might've cracked the top 20 if the pandemic hadn't canceled her 2020 "Where Do We Go?" world tour.

According to Vanity Fair, however, Eilish's team denies reports that she personally collected $25 million for her upcoming Apple TV+ documentary, "The World's a Little Blurry."

The film will follow Eilish's rapid rise to superstardom and show intimate details from her home life.

• Read more:
• The first trailer for Billie Eilish's documentary is here and it shows her toe the line between normal teen and global star
• Billie Eilish did the same interview for a 4th year in a row, and she was appalled by some of her old answers
• Finneas O'Connell says he and Billie Eilish succeeded without 'nepotism' after fans accused him of downplaying their privilege
• Every Billie Eilish song, ranked