iHeartRadio and Capital One's Jingle Ball 2016 wrapped up in Miami this past weekend with performance by: Alessia Cara, Charlie Puth, Tove Lo, Lukas Graham and many others. During the concert, Machine Gun Kelly and Camila Cabello of Fifth Harmony shared the stage together to perform 'Bad Things.' SUNRISE, FL - DECEMBER 18: Machine Gun Kelly (L) and Camila Cabello of Fifth Harmony perform at the Y100's Jingle Ball 2016 at BB&T Center on December 18, 2016 in Sunrise, Florida. (Photo by Gustavo Caballero/Getty Images for iHeart) The sold-out event at the BB&T Center in Miami was packed wall to