The drummer wowed the judges at the weekend with his performance, which including playing and DJing at the same time.
MckNasty - real name Joshua McKenzie - told the panel he was hoping to come out of the shadows of his famous brother, rapper Labrinth, who is signed to Simon Cowell's music label.
He said: “I’m always at the back and I want to be at the front.
"My brother is Labrinth, he is pretty cool. I like the fact that I have to chase him.”
After MckNasty's audition, Simon told him: “I think you’re brother’s going to be really proud of you, I really do."
Speaking to us today, MckNasty revealed that he would love to show off his own voice if he makes the cut to the semi-finals.
"I can sing, I would love to do something like that in the live shows, that would be amazing," he said. "I've had to sing and play the drums before!"
But Mcknasty's music would be different to that of his brothers, adding: "I'd like to do something that would be opposite to Labrinth, something that's got a rapping kind of flow to it but at the same time lot of melodic medley."
Watch our full chat with MckNasty below...