Kevin Brereton ( born February 20 , 1972 in Toronto , Ontario ) is an Canadian rapper and producer better known by his stage name , k-os which is an acronym for Knowledge of Self and is spelt with a lowercase `` k '' . Kevin Brereton ( born February 20 , 1972 ) , better known by his stage name k-os ( `` chaos '' ) , is a Canadian rapper , singer , songwriter and record producer .