Kourtney Kardashian Wears a Tiny Gold Swimsuit in Sexy Throwback Photos

Kourtney Kardashian
Kourtney Kardashian Gregg DeGuire/WireImage

Don't miss our St. Barts episode tonight! #KUWTK ??

A post shared by Kourtney Kardashian (@kourtneykardash) on

Paging Bieber! Kourtney Kardashian posted several throwback photos of herself on Sunday, December 20, from her family's summertime vacation on St. Bart's, where she playfully posed in a tiny gold swimsuit on a bike.

In the snaps shared on Kardashian's Instagram, the mom of three wears a slinky, metallic-gold one-piece that hugs her curves and shows off her slim, toned and sexy physique. In one snap, the reality star pouts and makes a kissy-face with her bold coral lips. In another candid pic, she leans over the bike with her teeny stems and laughs.

? in St. Barts #tonight #KUWTK ?

A post shared by Kourtney Kardashian (@kourtneykardash) on

That same day, Kourt shared another body-baring pic of herself in the gym with her sister Kylie Jenner. In the image, the girls both bare their abs in workout wear. "I've been trying to get her to workout with me for six months…" Kourt captioned the shot. "Today was my lucky day."

I've been trying to get her to workout with me for six months…today was my lucky day.

A post shared by Kourtney Kardashian (@kourtneykardash) on

Meanwhile, her swimsuit scene, which aired during the Sunday episode of Keeping Up With the Kardashians, was one of the few lighthearted moments from the getaway. While there was megadrama between Kris Jenner and Kim Kardashian, Kourtney found herself upset at one point while monitoring ex-boyfriend Scott Disick's whereabouts.

During the episode, the mom of Mason, 6, Penelope, 3, and Reign, 12 months, discovered that her ex-partner of nine years was cavorting around Mexico with a string of models. "I don't even want to know, but then it's like, how can you not look?" Kourtney said in the confessional.

She and Disick split this past July after he was photographed in the South of France getting cozy with his ex-girlfriend Chloe Bartoli. Us Weekly confirmed last week that Kardashian and Justin Bieber subsequently hooked up after the split  and have been getting together for months.

“Justin started hanging out with Kourtney alone because she started going out more," a source told Us of the reality star, 36, and pop star, 21. “Remember, she never really went out before, so he’s been showing her a good time.”

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