He even paused to sing a capella in Wembley! This image appears in the gallery:Summertime Ball 2018 Live: The Best Photos From On Stage At Wembley 27. He even paused to sing a capella in Wembley! Picture: Joshua Atkins 91 images See the full gallery: Summertime Ball 2018 Live: The Best Photos From On Stage At Wembley