Kourtney, 36, posed with sisters Kim, 35, and Kylie Jenner, 18, at the studio as West, 38, put the finishing touches on his highly anticipated seventh studio album, Swish.
“Studio hoes,” Kourtney captioned one of the photos. “#SWISH.”
The Kardashian sisters both held up their iPhones and showed off their curves in coordinated skintight black outfits, while Jenner kept it comfortable in a half-zip fleece jacket.
Based on these new pics, it appears Kim's new Atkins diet plan is working. The reality star tweeted January 19 about her postbaby weight loss since giving birth to son Saint in December. "I’m so excited! I'm 30 lbs down today but 40 to go! I'm so focused,” she wrote.
Swish is set to be released February 11.