Cat recently predicted that Mukisa's concert would flop, and as many other observers in the industry had expected, the numbers weren't impressive.
Gravity Omutujju said Kapa Cat is not among the musicians that qualify to criticise Martha Mukisa.
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But fellow singers like Spice Diana and Omutujju who have held shows at the same venue as Mukisa said she should keep the spirit up because the first show is usually tough.
Omutujju said his first concert at Freedom City had a poor turn-up. The rapper now fills up Lugogo Cricket Oval, which is currently the biggest venue for shows in town.
Meanwhile, Cat also said that Mukisa had no hit songs and her music is not yet polished.
Gravity Omutujju, who has a song with Kapa Cat called Centre, disagreed with her.
Omutujju said Mukisa has released better music, both lyrically and vocally -- than Cat and him.
"Anyone who has never organised a show shouldn't compare themselves to Martha Mukisa," Omutujju said during an interview with Galaxy F.M.
"Kapa Cat hasn't even done a quarter of what Mukisa has achieved. And that's not just about holding shows, even musically, Kapa Cat is not at the level of Martha Mukisa.
"I swear to 'sleeping with my mother', I sign off on that; I have a song with Kapa Cat... but that ki-girl [Martha Mukisa] can sing... I'm talking about serious music, not bubblegum.
"Kapa Cat and I are not different, we are both survivors. I'm talking about melodic voices. Martha is in the class of singers like Rema [Namakula]. She has the kind of music that reels you in and you feel its rhythm."
A songwriter too, Martha Mukisa gained mainstream attention after collaborating with Eddy Kenzo on Sango in 2021.