PSY takes centre stage at the Summertime Ball 2013 performing new single 'Gentleman'. This image appears in the gallery:The Summertime Ball 2013 Highlights - Pictures 86. PSY takes centre stage at the Summertime Ball 2013 performing new single 'Gentleman'. Picture: Danny North 122 images See the full gallery: The Summertime Ball 2013 Highlights - Pictures