Jade, Leigh-Anne, Perrie and Jessie of Little Mix wow the 16,000 people at London's O2. This image appears in the gallery:Amazing Pictures From The 2013 Jingle Bell Ball Sunday Show 65. Jade, Leigh-Anne, Perrie and Jessie of Little Mix wow the 16,000 people at London's O2. Picture: Danny North 91 images See the full gallery: Amazing Pictures From The 2013 Jingle Bell Ball Sunday Show