Pixie Lott hangs out backstage ahead of her on stage performance of 'Mama Do'. This image appears in the gallery:Backstage At The 2011 Jingle Bell Ball (Saturday) 3. Pixie Lott hangs out backstage ahead of her on stage performance of 'Mama Do'. Picture: PA 19 images See the full gallery: Backstage At The 2011 Jingle Bell Ball (Saturday)