Well, that's one way to celebrate!

Kylie Jenner may have launched a massive holiday makeup collection on Thursday, but it seems after all her hard work, all she wanted to do was relax in her undies.

WATCH: Kylie Jenner Shares Pic of Her Naked Body Painted Blue on Election Day

Shortly after showing off the colors from her upcoming Kylie Cosmetics Holiday Edition, the 19-year-old reality star took to Instagram to share a sexy underwear-clad snap.

"Love my new co-ord from PrettyLittleThing.com @OfficialPLT," she captioned the shot.

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Jenner may have been celebrating more than just her makeup launch with her racy look. Hours after posting the sexy pic, the Keeping Up With the Kardashians star wished her boyfriend, Tyga, a happy 27th birthday.

"happy early birthday @kinggoldchains ?," she captioned a cute Instagram video.

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With the success of her cosmetics line, it's no wonder the youngest of the Kardashian-Jenner clan was recently ranked one of America's highest-paid reality stars in Forbes magazine.

In fact, Jenner actually came in second place, just behind big sis Kim Kardashian. The social media maven trailed behind Kardashian's $51 million income, will a cool $18 million herself. Kendall Jenner followed with $17 million, while Khloe Kardashian, Kris Jenner, and Kourtney Kardashian rounded out the list's top six with $15 million, $11. 5 million, and $10 million respectively.

See more in the video below.