Sigma are an English electronic dance music DJ and record production duo consisting of Cameron James “Cam” Edwards and Joseph Aluin “Joe” Lenzie. They met at Leeds University at club nights. Their 2010 collaboration with DJ Fresh, “Lassitude”, peaked at number 98 on the UK Singles Chart. Their single “Nobody to Love” topped the UK Singles Chart, becoming their first UK number one. Follow-up single “Changing”, featuring Paloma Faith, also got to number one.