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Kim Kardashian dropped a large chunk of change to celebrate Janet Jackson's 55th birthday.

The 40-year-old reality television star revealed that she purchased the singer's iconic outfit from her 1993 hit music video for If.

'For @janetjackson's bday bc I'm such a fan I can't believe I won this on juliens_auctions,' she wrote over a still from the video on her Instagram Stories on Sunday.

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© Provided by Daily MailPurchase: The 40-year-old reality television star revealed that she purchased the singer's iconic outfit from her 1993 hit music video for If.

'Happy birthday queen!,' Kim added to a lengthy clip of the music video on her Stories as Janet hit the milestone on Sunday.

The acquisition was part of the pop legend's auction, which features a trove of prized possessions going all the way back to her childhood and beyond.

The auction is being held from May 14-16 by Julien's Auctions in honor of her big day.

She thanked Kardashian with a slide on her own Instagram Story: 'Thank u so much @kimkardashian! I hope 'IF' gives u as much pleasure as it did me.'

'Fan': 'For @janetjackson's bday bc I'm such a fan I can't believe I won this on juliens_auctions,' she wrote over a still from the video on her Instagram Stories

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The historic auction house broke the news that the custom-made cropped suede top with artificial bone detailing and a pair of black lace-up front pants had sold on Friday.

'SOLD for $25,000!, they Tweeted, now unveiled as the amount spent by the Keeping Up With The Kardashians star. 

The SKIMS founder has a history of racking up Jackson family memorabilia. 

She and ex-husband Kanye West, 43, bought their daughter North, seven, a one-of-a-kind jacket once worn by Michael Jackson in 2017 for $65,625.

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'North is a really big Michael Jackson fan and we knew she would love this,' Kim said on her Instagram Stories at the time. 

The former couple, who divorced in February, also spent money on the white fedora he wore in his 1988 music video for Smooth Criminal.

Janet's auction is being called Iconic Treasures From the Legendary Career and Life of Janet Jackson, and features more than 1,000 items from throughout her life.

A portion of the proceeds will be earmarked for Compassion International, an organization that works with churches across the globe to help children escape from poverty. 

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'Can't believe this will be the last time I'll see some of these items, but it's for a good cause,' she said in a video announcing the event.

Fans of the Escapade singer can purchase box sets with the auction catalogs, as well as a video message from Jackson and an audio message inviting owners to the auction, which runs for $200 for the standard box set and $800 for a signed and numbered deluxe set.

Some of the items come from Jackson's early ascent to superstardom, like a black-and-white photo of her with legendary actress Shirley Temple and a pencil drawing of her older sister La Toya Jackson, which had her name and Janet's written in blue pen.

Treasures: Janet's auction is being called Iconic Treasures From the Legendary Career and Life of Janet Jackson, and features more than 1,000 items from throughout her life

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Also featured are more legendary costumes like the ones from her music videos for Love Will Never Do (Without You) and All For You. 

Her outfit from the Scream clip co-starring her brother Michael sold for $125K and the Rhythm Nation look was nabbed for over $81K. 

Executive Director at Julien's Auctions Martin Nolan recently said celebrity bids on the items have been exciting for him to see.

'It always really stuns me when a celebrity is so impressed with another celebrity that they want to own something from their collection. That's most usual for us to know that there's always other celebrities participating, wanting to own something -- especially something so amazing from Janet Jackson because everything has been stored so well, it's in pristine condition,' he told Entertainment Tonight   

The auction is expected to bring in $2 million. 

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