Hailey Bieber, Bella Hadid, and Stassie Karanikolaou had a lively girls' night out, celebrating Hadid’s new swimwear ...

The trio stepped out in celebration of Hadid's new cowgirl-themed Frankie's Bikini's collection on Thursday night.

A video showed Justin Bieber staring blankly into the camera as he posed with Hailey, who smiled and playfully stuck out her tongue to lick his cheek ...