Cassper Nyovest will perform at FNB Stadium in Soweto this Saturday. Picture: Instagram

Local rapper Cassper Nyovest's upcoming #FillUpFNBStadium has been a hot topic in recent weeks.

The 'Mama I Made It' hitmaker has been campaigning hard to sell tickets for the 2 December concert, and the struggle has been real. 

PICS: Cassper Nyovest shows off his ripped bod

Cassper has also been very vocal about the challenges on social media, resulting in other local celebs offering support and big brands, like Ciroc Vodka and Budweiser, backing the star's mission to fill up the stadium.

However, it was fellow rapper AKA's offer to perform at the concert — for a cool R1 million — that really set tongues wagging.

Cassper, however, gracefully declined AKA's offer and encouraged the rapper to "just buy a ticket, broer".

And in a recent interview on 'Real Goboza', Cassper explained his response.

He said: "Here's my thing. Me and AKA have had our fair share of fights and I took a conscious decision two years ago to avoid that topic or name. 

"Because I felt like it's over now, its boring. 

"Every time I do something his name has to come up, so I was like, 'I'm over that' and I moved on. 

"Then he comes along, a few days before the show, and says whatever he says and adds that I need to give him a million rand to come and perform at the show... first of all I never asked you to come and perform."

Cassper added that there were multiple ways rappers could support each other, but a collaboration between him and AKA was "unnecessary" because their relationship was "not genuine". 

Watch the full interview below: