Curves ahead!

Leave it to the Kardashians -- and soon-to-be Kardashian, Blac Chyna -- to pull out all the stops at their grandmother’s birthday party.

WATCH: Kim Kardashian Rubs Blac Chyna’s Baby Bump on Snapchat Amid Rob Kardashian Split Rumors

The whole crew arrived to MJ's birthday bash in San Diego, California, on Tuesday night, dressed to the nines in skin-tight dresses.

Kim arrived at the restaurant in a curve-hugging black leather mini dress, keeping it simple with her accessories; strappy pink sandals and a gold necklace, with her hair in a high ponytail.

Khloe showed off her hard work at the gym in a skin-tight suede number and camel pumps.

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Kourtney opted for a more relaxed look, but took a note from Kim, showing off her toned legs in a pair of leather shorts and a black tank top, which she paired with a long white, sheer jacket and strappy heels.

Kourtney even commented on her sisters’ show-stopping looks in a hilarious Snapchat.

"What the f**k are we doing, Khloe? I have three kids waiting and you guys are getting ready for the f**king Oscars," she jokingly yelled at Khloe.

And not to be left out, Blac Chyna got the mini dress memo, arriving to the soiree in a white long-sleeved dress that hugged every curve -- including her growing baby bump!

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While Chyna's fiancé, Rob, was MIA, it seems things are still very much on between the two.

Despite Rob's recent Instagram purge -- in which he deleted all photos of Chyna -- the model has continued to show off her engagement ring on Snapchat.

See more in the video below.