The Kerrang! Award for Best Single is an honor presented at the Kerrang! Awards, an annual ceremony established in 1993 to recognise achievements in rock music. The award was renamed 'Best Song' for the 2018 ceremony onwards, but serves the same purpose. Like all Kerrang! Awards, the trophy awarded to the winning act is shaped in the style of the 'K' from the Kerrang! logo.

Thirty Seconds to Mars is an American rock band from Los Angeles, California, formed in 1998. The band consists of brothers Jared Leto and Shannon Leto. During the course of its existence, it has undergone various line-up changes with the Leto brothers being the only consistent members.