Now that's hot: Nicole Richie accidentally sets her hair on fire at her 40th birthday party

Everyone is supposed to feel hot on their birthday, but not from a literal fire, which is exactly what happened to Nicole Richie during her 40th birthday party.

The fashion designer was celebrating the big 4-0 Tuesday night with an outdoor gathering when she leaned in to blow out the candles on her cake. Before she knew it, both ends of her hair were on fire.

She shared the moment on Instagram where she’s seen blowing out candles on a cake with an old photo of the designer that says “Happy Birthday Nicole.”

“Well… so far 40 is 🔥” she captioned the post.

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Her husband and lead singer of the band Good Charlotte, Joel Madden, commented “that’s hot,” a riff on the catch-phrase she and co-star Paris Hilton popularized on "The Simple Life" in the early 2000s.

Stars like Kelly Rowland, Ellen Pompeo, Amy Schumer and Zooey Deschanel also commented, making sure she was OK from the flames.

Madden shared the video to his own Instagram story and a post dedicated to her that’s captioned “Happy Birthday Nicole❤️ You’ve made love feel timeless I’ve forgotten how old we are ❤️🥰.” She and Madden share daughter Harlow Winter Kate, 13 and son Sparrow James Midnight, 11.

Her adopted father and legendary singer, Lionel Richie, shared a photo to his Instagram saying Richie has been rainbows and butterflies her whole life. He continued to say, “but you will always be my little girl, no matter how many birthdays we celebrate 🎉 !! 🎂.”

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Representatives for Richie could not be immediately reached for comment.

Since her time with Hilton on "The Simple Life," Richie has become a judge on the reality competition “Making the Cut” and had a regular acting role in the sitcom “Great News.”

Richie is also the founder of the lifestyle brand House of Harlow, which launched in 2008. It started as a costume jewelry brand but has since transformed into clothes, footwear, apparel and limited-edition collections.

Follow Keira Wingate on Twitter: @KeiraRenee

This article originally appeared on USA TODAY: Nicole Richie's hair catches fire blowing out 40th birthday candles