South African rapper Costa Titch, 28, died suddenly on stage while performing, police said on Sunday.
Key points:
Costa Titch collapsed while performing at Ultra Festival
Videos show him getting up and continuing to sing before dying
The death comes a month after the killing of fellow South African rapper AKA
The artist, whose real name is Costa Tsobanoglou, "collapsed while he was performing" on Saturday evening at the Ultra South Africa concert in the Johannesburg suburb of Nasrec, police told AFP.
They said a post-mortem would establish the cause of death.
Costa Titch scored a major hit with Big Flexa, which has more than 45 million YouTube views, showcasing the amapiano local subgenre of house music blending house, jazz and lounge music.
Videos on social media of his concert show him performing with his microphone in hand when he appears to fall.
He continues singing but collapses again, prompting other artists to come to his aid.