He's biggest pop star in the world.

So it's no surprise that GOP donors in the US wanted to bankroll a Justin Bieber concert to the tune of $5 million while the Republican National Convention took place just minutes away, according to TMZ.

But after some deliberation, the Sorry singer, 22, declined after his manager Scooter Braun allegedly threatened to quit and NBA superstar LeBron James urged him to steer clear.

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Declined: GOP donors in the US wanted to bankroll a 'non-political' Justin Bieber concert to the tune of $5 million while the Republican National Convention took place just minutes away

MailOnline has contacted a representative for Justin and is awaiting comment.

According to the celebrity gossip publication, a source close to CAA - the agency that represents Justin - said the hitmaker was asked to perform 45 minutes away from Cleveland's Quicken Loans Arena - the setting of the RNC.

While assurances were allegedly made that the performance would be non-political, Justin's manager Scooter Braun is a known supporter of Trump's presidential rival Hillary Clinton, having even hosted a fundraiser for the Democrat candidate at his home in Los Angeles.

It was reported that Braun mentioned to Justin that he should discuss erecting Black Lives Matter signs at the show, but the donors rejected the idea, suggesting All Lives Matter signs instead.

Thanks, but no thanks: After some deliberation, Justin declined after his manager Scooter Braun allegedly threatened to quit and NBA superstar LeBron James urged him to steer clear of GOP funded gig

It has been claimed that NBA star James' attendance in Cleveland was used to persuade Justin, but when the pop star's team reached out to the sportsman's it was revealed he wasn't going.

In fact, LeBron apparently tried to persuade Justin from doing the gig, which would've provided his highest one off payment to date.

Meanwhile, Justin's success shows no signs of slowing down anytime soon, after he was nominated for the Video Of The Year gong MTV Video Music Award, alongside Kanye West, Drake, Beyonce and Adele.

Justin's Sorry (which the pop star does not actually appear in) is also nominated for Best Pop Video, and he also received a Best Breakthrough Long Form Video nod for PURPOSE: The Movement.

And the star could soon be making the leap to the big screen.

He is believed to be eyeing a potential screen project, but he is reportedly holding out until a scene featuring his character having sex with another man is written out.

Writer Pete O'Neill told the New York Post's Richard Johnson that the singer has been offered the role of a pop star in Uber Girl, but won't sign on until it undergoes a 'major rewrite'.

He won’t take the part unless the sex scene with him and one of the male backup dancers is taken out of the final script,' O'Neill, who is co-writer on the coming-of-age project, told the publication.