Dave added lyrics to his song "Black" at the Brit Awards to call Boris Johnson a "real racist".
The crowd cheered on as the Streatham-born rapper made the change during a stirring rendition of the song, which is taken from his album Psychodrama.
Dave also criticised the British media's treatment of Meghan Markle in comparison to how it treated Kate Middleton.
He rapped: "And if somebody hasn't said it / Equality is a right, it doesn't deserve credit / If you don't wanna get it, then you're never gonna get it / How the news treats Kate versus how they're treating Megan."
"It is racist, whether or not it feels racist / The truth is our Prime Minister is a real racist."
Dave calls Boris Johnson 'a real racist' in powerful Brits performance
Rapper also criticised the British media's treatment of Meghan Markle
www.independent.co.uk
Incredible performance and incredible song. He also won Album of the Year.