Kylie Jenner may be playing second fiddle - to another woman for the first time in a LONG time.

New pics were released of Kylie's new best friend (post Jordyn Woods) Stassie Karanikolaou. Stassie is an Instagram model that - like Kylie -  loves plastic surgery and Black men (preferably rich and famous ones).

Yesterday, Kylie's BFF Stassie was spotted on Kylie's yacht. And Kylie was wearing a teeny green bikini and showing off all her latest surgical enhancements.

Stassie was wearing a lime green bikini that showcased her sexy beach body - while out on her luxury yacht in the Italian seas of Positano. Stassie was on the yacht as one of Kylie's guests. Kylie and her friends were there to celebrate Kylie's 22nd birthday out at sea. 

Here are the pics of Stassie that have people talking:

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It seems, Kylie is strengthening her bond with other friends after she and Jordyn Woods went their separate ways.

"Kylie has always had girlfriends in her life, but now that Jordyn Woods is out of the picture, she has gotten closer with some of her other friends," a source shared with E! News. "They have always been a part of her life, but she is spending more time with them now and in a bigger group."

Kylie and Stassie, who’s also known as her online username Stassiebaby, first met at bookstore Barnes & Noble when Kylie appeared for a fan event, she revealed on her Instagram story as part of a lengthy tribute to her pal. Kylie also said Stassie grew up with her and basically lived in her house, before officially moving into Kylie’s house with Jordyn. Jordyn has since moved out of Kylie’s home, though it’s unclear if Stassie still lives with her.

“You’ve been the most consistent and loyal friend in my life,” Kylie once gushed to Teen Vogue about Stassie, “and I feel like without you, I wouldn’t be the person I am today. Because I wouldn’t be weird anymore. I’d be trying to be normal.”