The Kardashians hit up The Nice Guy on Monday night

By Andrea
Updated February 16, 2016 02:31 PM
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Kourtney and Khloé Kardashian‘s brought their breakover style to Grammys night.

The sisters wore coordinating black jumpsuits to a post-award show party hosted by family friend (and, as sources told PEOPLE, Kourtney’s former flame) Justin Bieber at West Hollywood hotspot The Nice Guy on Monday night.

Kourtney Kardashian post-Grammys party


LA Photo Lab/Splash News Online

Jumpsuit enthusiast Kourtney, 36, opted for a black lace number with plunging neckline over a solid black bodysuit. She middle-parted her sleek strands and accessorized with a wide black choker, black leather clutch and solid black pumps. Khloé, 31, no stranger to a curve-hugging jumpsuit herself, went for a solid black, cleavage-baring look with side cutouts, which she paired with beachy waves, a glittery clutch and strappy black heels.

Khloe Kardashian post-Grammys party


PapJuice/WOW/INFphoto.com

Kourtney and Bieber sent rumors flying in December when they were spotted cozying up to each other at The Nice Guy.

“[Bieber] and Kourtney were nearly inseparable — smoking on the patio together and were super touchy-feely,” a source told PEOPLE at the time.

Although Khloé seemingly shut down these rumors during an appearance on
Watch What Happens Live
in January, saying that no one in her famous family had hooked up with the Grammy winner, Kourtney appeared flustered when Ellen DeGeneres dug deeper about her relationship with the 21-year-old.

“We’re friends,” was Kourtney’s only response when DeGeneres repeatedly asked her about Bieber, who wowed the crowd with a medley of his hits at the Grammys.

What do you think of the Kardashian sisters’ sexy black jumpsuits?

— Andrea Park