"Killer" is the debut solo single released by British hip hop producer and rapper Fazer, also known for his work with the hip hop trio N-Dubz. Killer was taken as the lead single from his untitled debut studio album. The single was released on August 26, 2012, peaking at #17 on the UK Singles Chart. He became the only member from N-Dubz not to score a number one single with his first solo hit.
The music video for the track was directed by Jack Fresh, although the concept for the video was written by Fazer. The video depicts Fazer being kidnapped by a group of girls, and then detained in a cell. He then goes wild whilst trying to free himself from a straitjacket.