The twosome were spotted indulging in some retail therapy with one another at Barneys New York department store on Thursday afternoon (19 December), and then grabbing lunch at a Fred Segal Café nearby.
Proving that they have opposing styles, Kylie opted for a quilted mini-skirt and a cropped black top, while Kendall chose to cover up in a pair of ripped boyfriend jeans and a loose-fiiting T-shirt.
Both sisters also protected their peepers with a pair of sunglasses and accessorised with black handbags.
The teenage girls have been busy dodging rumours recently, claiming they are each loved-up with famous guys.
Kendall, 18, was recently spotted with One Direction singer Harry Styles, who she apparently even flew to London to visit last weekend.
The pair were first thought to be seeing one another after Harry was pictured taking Kendall out for dinner in LA last month.
However, both stars have chosen to keep schtum for now, leaving us thinking they're just friends after all.
Meanwhile, Kylie has once again denied reports that she is dating Will Smith's son, Jaden.
This month, the 16-year-old opened up about her love-life with American magazine Seventeen and admitted that she and Jaden are just best friends.
When asked about who she would like to go to her prom with, Kylie replied: "If I couldn't find a boyfriend, I would want to go with one of my best guy friends, like Jaden [Smith]. I know I'd have fun with him – he makes me laugh and he is a great dancer."
On Wednesday (18 December), the Kardashian sister and Jaden were spotted on the red carpet for the premiere of Justin Bieber's new film, Believe, but chose not to pose for a photo together.
Kylie later tweeted: "I always see articles about who i'm supposedly dating and who I'm not. As of now, I'm keeping that part of my life as personal as possible."
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