Jamar Knight – Demonstrate That (fka Jmartyr) Listen to the single and you can download below. 3 Responses AaquilClay February 15, 2013 best song of 2013 hands down. “@JamarKnight: NEW SINGLE!! Free single @JamarKnight – Demonstrate That (fka Jmartyr) http://t.co/S90xkbie” Reply JamarKnight February 15, 2013 @AaquilClay love you man. #PTII Reply AaquilClay February 16, 2013 @JamarKnight love you too. its all getting started right now, Its opening up for us #2013 #PTII Leave a Reply Cancel Reply Your email address will not be published.CommentName* Email* Website Notify me of follow-up comments by email. Notify me of new posts by email.