Kenneth Umezie, 31, from Camberwell, south London, will appear before magistrates in Bromley later today.
Mr Kamara was stabbed in Camberwell on the evening of 1 August.
The 23-year-old, who had been part of drill music group Moscow17, died at the scene.
Three others, aged 16, 18 and 19, were arrested in connection with the incident.
They have been released while investigations continue.
More than 80 people are suspected to have been killed in London since the start of 2018.
News Source SkyNews