The short clip, circulating on social media, shows the couple surrounded by their team as they hurriedly leave a nightclub on Saturday night where the singer performed.
Justin, wearing a green T-shirt, speaks animatedly while gesturing with one hand at the model, 24, as they move.
Eyewitnesses have spoken out since claiming the star, 27, was simply running on ‘adrenaline’ having performed earlier.
One who had been at the event shared a video of the Sorry singer on stage and tweeted: ‘I took this of Justin right before that video was taken.
‘He was on STRAIGHT adrenaline from performing. He wasn’t mad at Hailey and he wasn’t yelling at her. I hate how he’s always painted as the bad guy when he’s the furthest thing from it.’
Another fan claiming to be at the show added: ‘My friends and I were with/behind him the whole night, he was in the best mood and was telling her a story but ofc (sic) internet lames love their lil scenarios.’
A further Twitter user chimed in: ‘He was not yelling and we were there to witness what went down. He was all adrenaline.
‘It doesn’t matter how the f**k it appears to you. Don’t spread false information on someone especially when you acknowledge that’s just what it appears to you. That’s defamation of character.’
Metro.co.uk understands the star was in good spirits the entire night, with the pair staying on to have a party. Justin even poured drinks for bystanders.
Their appearance was part of a busy weekend of partying as the Biebers helped pal Kendall celebrate her brand 818 Tequila.
They added: ‘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.’
Hailey herself had a great time, as she reposted a video from Justin titled ‘Vegas show recap’ on her Instagram Stories, captioning it ‘Best weekend!!!’
Justin’s rep declined to comment when contacted by Metro.co.uk.
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