Washington, Jan 12: American rapper Curtis James Jackson III or 50 Cent, as he is known, has slammed his singing rival Kanye West in a new song by poking fun at him.
Jackson was a little peeved with West, who released 808s and Heartbreak last year, and then came out with a new sound that did not follow his rap tune.
He criticised West''s change of tune at the time, and has now put his feelings about the latter's music in a new track called Heartless Monster.