Justin Timberlake appears on stage to begin his hosting duties at the Summertime Ball 2013. This image appears in the gallery:Justin Timberlake At The Summertime Ball 2013 - Pictures 2. Justin Timberlake appears on stage to begin his hosting duties at the Summertime Ball 2013. 11 images See the full gallery: Justin Timberlake At The Summertime Ball 2013 - Pictures