Justin, Hailey Bieber Enjoy Night Out With Kendall Jenner, Other Pals In Las Vegas: Report

Justin Bieber and his wife Hailey Baldwin had a fun night on the town with friends Saturday in Las Vegas.

The couple partied with pal Kendall Jenner to celebrate the reality star's new tequila brand, 818 Tequila, in the new club Delilah at the Wynn Las Vegas, E! News reported. They were joined by Justine Skye, Ryan Good, Maeve Riley, Zak Bia, Kelia Moniz and other friends of the Biebers.

"The group arrived together to Delilah after pre-gaming on a party bus that took them on the strip and then to the venue," an unnamed source connected to the club told the outlet. "They arrived around 11:30 pm and were escorted to their own private table. The club was packed and many people were trying to approach their table."

The "Intentions" singer was in a great mood and treated others at the club to a surprise performance, according to the insider. He took the stage and sang some of his songs.

"He looked really happy to be singing and was dancing and vibing with the crowd," the source continued. "He was smiling and in a great mood. Several bottles of 818 tequila were brought out by club employees and everyone was chanting '818' and holding the bottles in the air. They were serving specialty cocktails with 818, including one that Kendall created, and had bottles on tables throughout the club."

According to the insider, Bieber not only performed, but he also poured shots for the crowd with Jenner. Meanwhile, his model wife and the other ladies in the group also enjoyed their time at the club, the source said.

They "definitely looked like they were having a fun girls' night out together and were all drinking and dancing together with the other girls at the table, while Bieber was on stage performing. They all left around 2 am," the source told E! News.

In related news, Bieber appeared on GQ's cover for its May issue, and in the accompanying interview, he opened up about the ups and downs of his marriage with Baldwin. The couple will be celebrating their third wedding anniversary in September.

"The first year of marriage was really tough because there was a lot going back to the trauma. There was just a lack of trust," the "Sorry" singer told the magazine. "There was all these things that you don't want to admit to the person that you're with, because it's scary. You don't want to scare them off by saying, 'I'm scared.'"

Bieber also noted his wife's influence on his career. "One thing that has been so helpful is my wife is so by the book. She’s so structured and routine and so responsible," he said, adding that Baldwin helped him "realize that I either take responsibility for this or else I’m not going to be able to sustain a certain lifestyle that I want."