Libera is an all-boy English vocal group founded by the late Robert Prizeman. Libera performs concerts in many countries, including the UK, the US and throughout Asia, and often makes recordings for their own album releases and other projects. The group's name comes from its signature song, "Libera", which is based on the "Libera Me" portion of the Requiem Mass. Libera is the Latin singular imperative of liberare, meaning "to free".