The drum-and-bass duo, Sigma, are hyping up for their performance RIGHT NOW! This image appears in the gallery:AAA Pass At The Ready? Check Out The Best Backstage Moments From Capital's Jingle Bell Ball With Coca-Cola 25. The drum-and-bass duo, Sigma, are hyping up for their performance RIGHT NOW! 69 images See the full gallery: AAA Pass At The Ready? Check Out The Best Backstage Moments From Capital's Jingle Bell Ball With Coca-Cola