Radio hosts investigate theory Justin and Hailey Bieber have split

Rumors surrounding celebrity couples and their relationship statuses can spread like wildfire online, resulting in fans doing their own digging into the private lives of the rich and famous.

Often this can involve a lot of speculating varying in substance, from cold-hard evidence to flimsy rumours that can be harder to believe.

And in the latest break up rumour, radio hosts Kyle Sandilands and Jackie 'O' Henderson have investigated the theory that Justin and Hailey Bieber may have secretly split.

While hosting The Kyle and Jackie O Show earlier this week on KIIS FM, the duo broke down a theory that suggests the couple may actually be no longer together.

@justinbieber/Instagram

Jackie started off by saying: "Fans are convinced Hayley Bieber and Justin Bieber are splitting up."

She then went on to say how Hailey posted a series of photos to Instagram to mark her husband's birthday on 1 March.

The radio host described the post as 'lovely', with Hailey posting three loved up photos of the couple, as well as a throwback picture of Justin as a toddler.

In the post, Hailey wrote: "Twenty-nine never looked so good. Happy birthday to you, best friend! Words couldn't possibly sum up all that you embody.

"So here's to more joy, more travel, yummy food, adventures, more peace, fun, and most of all more love."

However, Jackie was quick to point out that the singer hadn't even liked the post, fueling the speculation even further.

Kyle and Jackie O/YouTube

Jackie also pointed out how Justin is 'not wearing his wedding ring', while it was also spotted that the singer had also started following his ex-girlfriend, Selena Gomez, on social media again.

She said: "I think the one we can definitely read into here, the one that makes me question what is going on, is the fact that over the weekend, he started following Selena Gomez on Twitter.

"I mean, what's going on there?"

The speculation comes after a supposed feud between Hailey and Selena, with the latter subsequently taking a break from social media due to the internet drama surrounding the pair.

@haileybieber/Instagram

Earlier this month, old footage came to light of Hailey mocking Taylor Swift during the time she co-hosted the show Drop the Mic.

Selena commented on the resurfaced video, saying: "So sorry, my best friend is and continues to be one of the best in the game."

Hailey and Justin first got together in December 2015, though they only dated for around a month. They then got back together in 2018, were engaged in the July of that year and were married in the November.

UNILAD has contacted Justin and Hailey Bieber's representatives for comment.