Known for his dour image and sharp wit, the singer found fame in the 1970s and 80s with hits like Ghost Town, Gangsters and Too Much Too Young.
He left The Specials in 1981 to form Fun Boy Three with fellow-bandmates Neville Staple and Lynval Golding, scoring another run of hits.
The singer died after a brief illness, The Specials said in a statement.
LIBERTY - 1) The condition of being free from confinement, servitude, or forced labour - 2) The condition of being free from oppressive restriction or control by a government or other power - 3) A right to engage in certain actions without control or interference by a government or other power.