Justin Bieber, wife Hailey kiss at Kendall Jenner’s party

She’s his favorite girl.

Justin Bieber shared a sweet Instagram photo of his wife, Hailey Bieber, kissing him at Kendall Jenner’s 30th birthday party.

In the rare PDA pic, the Rhode beauty founder put her arms around the pop star and gave him a smooch, as he smiled and wrapped his arms around her.

Hailey, 28, wore a backless animal-print halter dress, while Justin, 31, kept it casual in a white tank-top and khaki pants. The two were in front of Mylar balloons spelling out “Happy birthday Kendall.”

A second pic in the carousel showed him smirking while wearing a bright yellow jacket and driving a golf cart.

The singer also shared a black-and-white selfie of the duo on Tuesday, in which he rocked an Adidas jersey and nose ring.

The Biebers were just some of the celeb guests at Jenner’s lavish beach bash on Mustique Island Monday night. Model Justine Skye and Jenner’s famous family — her mom, Kris Jenner, and sisters Kim Kardashian, Khloé Kardashian and Kylie Jenner — were also part of the festivities that included plenty of tequila and a massive fireworks display.

Kendall showed off her toned figure in a printed silk maxi skirt and coordinating scarf top, tied across her chest and around her neck, all designed by Dries van Noten.

Meanwhile, Justin and Hailey appear to be in a good place in their marriage after experiencing a few ups and downs earlier this year.

He recently admitted to a tense moment with Hailey during the birth of their son, Jack Blues.

The singer explained via Twitch last month that he felt the doula was “pushing [him] to the side” when he felt the “need to console” his wife.

“It’s instinctual to be a dad and to, like, be there,” he explained during the stream, noting that while he appreciated the doula’s desire to “help facilitate,” he wanted to “be in there too.”

Justin ended up apologizing to the doula per Hailey’s request, but he also asked the doula not to “take away from [his] moment either as the dad.”

“I’ve got good instincts with this stuff too,” he noted.

Hailey shared last month that she wants more kids with her husband.

“I know I want more than one, but I’m not in a rush,” the Rhode founder shared during her appearance on the “In Your Dreams With Owen Thiele” podcast.