Kendall Jenner Celebrates Her 20th Birthday in the Sexiest Jumpsuit We've Ever Seen

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Kendall Jenner is going into a new decade in style.

On the eve of the reality star's 20th birthday, she celebrated by wearing a jaw-dropping, cleavage-baring black jumpsuit. Kendall topped off her sexy style with a top knot 'do and bright red lipstick.

WATCH: This Is What Kendall Jenner Would Look Like Pregnant

The model
's party was held at The Nice Guy bar in West Hollywood, California on Monday night, with her sisters were in attendance. Kim, Kourtney and Khloe Kardashian, as well as momager Kris Jenner, arrived in all-black outfits. Kris was joined by her boyfriend Corey Gamble, and Kim's husband, Kanye West, also showed up.

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Kylie Jenner, 18, arrived to the party in an orange jumpsuit and what appeared to be a blunt bob wig. Her boyfriend, 25-year-old rapper Tyga, was attendance as well.

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Kendall's famous pals joined her family on her birthday night, including two of her prior rumored love interests. Both Nick Jonas and Justin Bieber were spotted outside the bar as well as Gigi Hadid, Miguel, Willow and Jaden Smith.

And, of course, the Kardashian-Jenner party included a photo booth. "Happy birthday Kendall pot pie," Kylie captioned a goofy pic of herself posed with her sister and some friends.

Kendall has been in the spotlight since a young age, but the Keeping Up With the Kardashians star has never fessed up to being in any romantic relationships. Could this be the year?

Here's what she told ET exclusively about why she's never publicly dated:

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