Harley "Sylvester" Alexander-Sule Of Rizzle Kicks Performs The Duo's Set. This image appears in the gallery:Amazing Pictures From The 2013 Jingle Bell Ball Saturday Show 75. Harley "Sylvester" Alexander-Sule Of Rizzle Kicks Performs The Duo's Set. Picture: Danny North 95 images See the full gallery: Amazing Pictures From The 2013 Jingle Bell Ball Saturday Show