Sigma were nominated for an award for MTV Stars Of 2014 This image appears in the gallery:Countdown To The Capital Jingle Bell Ball With Morrisons 27. Sigma were nominated for an award for MTV Stars Of 2014 As voted for by fans, Sigma go up against the likes of 5SOS, Ariana and Beyonce for the MTV award. 30 images See the full gallery: Countdown To The Capital Jingle Bell Ball With Morrisons