Nicki Minaj, Jessie J and Ariana Grande performed their new song 'Bang Bang.' This image appears in the gallery:The American Music Awards 2014 In Pictures 11. Nicki Minaj, Jessie J and Ariana Grande performed their new song 'Bang Bang.' Nicki Minaj, Jessie J and Ariana Grande 25 images See the full gallery: The American Music Awards 2014 In Pictures