Justin Bieber and Kendall Jenner spark dating rumors as they were recently spotted getting quite intimate with one another.

The couple was at a party in Ibiza, Spain, on Friday night, Aug. 1, to celebrate their mutual friend Givenchy artistic director Riccardo Tisci's 40th birthday.

"Kendall and Justin were inseparable for most of the night," a source revealed to The Sun. "Justin has always been good friends with the Kardashians, so he and Kendall go way back.

"As soon as Justin arrived he made a beeline for Kendall the moment he spotted her," the source said. "They were seriously flirting and kept going in and out of a photo booth together. There was lots of laughing and teasing and they were taking endless selfies."

The 18-year-old aspiring model took to her Instagram account to post a photo of herself cozying up with the 20-year-old singer. In the image, Bieber is facing her with both of his eyes closed, trying to make it seem as if he is about to kiss her, while Jenner puts her arm around his neck. "With the boys," she wrote the following caption.

Similarly, the "Baby" hitmaker Instagrammed a flirtatious snapshot of the two, which sees the "Keeping Up With the Kardashians" reality star leaning her head on his face and puckering her lips to his neck. The pop star also shared a picture with Kendall's mother Kris Jenner, putting his hands on her waist. "@kendalljenner @kyliejenner who's your daddy," he jokingly captioned the photo.

After enjoying each other's company and showing off their social media PDA, Justin Bieber and Kendall Jenner allegedly left the star-studded event together, holding hands.

"After partying for about two hours, they quietly slipped out of the party together and were seen holding hands," the source said.