Justin Bieber parties with Hailey at Doja Cat's A-list birthday bash

Justin Bieber and wife Hailey attended Doja Cat's star-studded birthday bash in LA on Monday - after paying tribute to Liam Payne and amid former mentor Diddy's sex trafficking arrest.

The singer, 30, looked somber as he and Hailey, 27, arrived at the party in matching black ensembles in keeping with the party's dress code - before heading home to their two-month-old son Jack Blues.

The Baby hitmaker wore a black top, velvet jacket and baggy navy trousers - paired with sunglasses, a hoodie and a tasseled hat.

New mom Hailey wore a black leather trench coat with a navy dress - with her locks slicked back into a bun.

Like Justin, she slipped on a pair of edgy shades. 

The singer who alongside Payne's band One Direction dominated the charts in the 2010s, shared a somber video of floral tributes and messages laid in Liam's memory - with the message: 'Rest easy, Liam.' This was followed by a broken heart emoji. 

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The One Direction star plunged from the third floor of the Casa Sur Hotel in Buenos Aires, Argentina on Wednesday, and died instantly from multiple injuries that led to 'internal and external haemorrhaging'. 

A voiceover on the clip said: 'Just remember: you are allowed to grieve as a fan. You are allowed to love someone you've never met. 

'You are allowed to admire someone for their art. You are allowed, to cry, to break, to feel like a part of you is gone.'

Liam and Justin had a chart rivalry which became a fully fledged feud after a YouTube video showed Payne appearing to make a dig at the Canadian singer.

But, despite their initial feud, Liam previously revealed how he and Bieber eventually connected and learnt they had much more in common than their boyish charm and good looks.

In a segment on a podcast with YouTube star Logan Paul filmed in 2022, which has resurfaced in the wake of his tragic death, the One Direction member revealed he had reached out to Bieber in an attempt to end the feud, and alluded to some of the striking parallels between the pair in the early days of their careers. 

The British boyband sold more than 70 million records worldwide while Bieber has sold more than 150 million.

Speaking on Logan Paul's podcast Impaulsive, Payne told his side of the story as he recalled speaking on Instagram while 'drunk', when somebody mentioned Bieber's name.

Payne recalled: 'I was like, "well the only thing between me and him is I haven't been arrested",' noting in the same breath that he didn't ever intend to offend Bieber.

He added: 'It started some beef.'

Payne recalled how the feud, which began online, began to spill into real life because One Direction and Bieber shared some fans and the stars themselves would often bump into each other at awards ceremonies.

However, he noted one particular awards ceremony when both the band and Bieber were there, and Liam thought: 'I'll have a chat with him' in order to settle the conflict.

Speaking about Bieber at the time, Liam noted: 'He had grown as a person.'

He then recalled telling Bieber: 'I've always felt for you... number one, I've done all the things that you've done and I've never been caught for any of them... number two, I've always really felt for you, mate, and I think in our situation we all suffer from the same disease.'

He then claimed he told the Canadian singer how, while he was able to lean on his bandmates in times of strife, Bieber was a solo artist who may not have had the same support system.

Payne claims Bieber's response was: 'Bro, that's given me chills.' From there, the pair became friends.

On Sunday, Justin posted to Instagram for the first time since the arrest of his one-time mentor, Diddy, with a combination of pictures of himself and bird-related images.

In the case regarding Combs, the embattled music mogul was hit Monday with a new wave of lawsuits accusing him of raping women, sexually assaulting men and molesting a 16-year-old boy - the first time he's been sued by a person alleging they were abused as a minor.

At least six lawsuits were filed against Combs in federal court in Manhattan, adding to a growing list of legal claims against the indicted hip-hop mogul, all of which he has denied.

Speaking exclusively to DailyMail.com in September, an insider said that new dad Bieber has been completely 'thrown' by the harrowing allegations and is grappling to make sense of them - especially given that he collaborated with Combs less than a year ago.

The source said of the fragile singer: 'Bieber is so disturbed by the Diddy news and is unwilling to process it or discuss it so he has shut off.'

'So many people who helped to make him who he is were very close to Diddy and it has completely thrown him.' 

The insider added that Bieber also deeply regrets having collaborated with the disgraced mogul last year, and would never have done so had he known the allegations that have since come to light. 

Over the weekend Hailey proudly supported Justin as he performed alongside Don Toliver in Los Angeles.

She was joined at the Crypto.com Arena show by friends Lori Harvey and Justine Skye. The ladies recorded bits from Toliver and Bieber's performance of their song Private Landing, which also features Future, and posted them to social media.