Marvin Humes and The Saturdays backstage at the Summertime Ball. This image appears in the gallery:Backstage At The Summertime Ball 2013 19. Marvin Humes and The Saturdays backstage at the Summertime Ball. The Capital FM presenter jokes that he is "filling in" for wife Rochelle Wiseman in the band today! 110 images See the full gallery: Backstage At The Summertime Ball 2013