Les Fleurs du Mal is a cover album and the fifteenth full-length album by Therion. It was released on 28 September 2012 to celebrate the 25th anniversary of the band. Named after the 1857 volume of poetry Les Fleurs du mal, the album is fully sung in French language. It consist of metal cover versions of French pop songs from 1960s and 1970s, mostly from the ye-ye genre.