Inside Justin and Hailey Bieber's star-studded friends night out in Vegas

Justin Bieber and Hailey Bieber went out for a fun night on the town with friend Kendall Jenner to celebrate her new drink brand. They hit up new club Delilah at Las Vegas. The Biebers and Kendall were joined by friends Justine Skye, Ryan Good, Maeve Riley, Zak Bia, Kelia Moniz and other friends. "The group arrived together to Delilah after pre-gaming on a party bus that took them on the strip and then to the venue," a source connected to the club exclusively told. "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 insider shared that Justin went on stage to perform some of his songs as a special surprise treat for the audience. "He looked really happy to be singing and was dancing and vibing with the crowd," the source shared. "He was smiling and in a great mood. They were serving specialty cocktails with 818, including one that Kendall created, and had bottles on tables throughout the club." The insider added that the group of women "definitely looked like they were having a fun girls' night out together and were all dancing together, while Bieber was on stage performing."