Iron Butterfly is an American psychedelic rock band, well known for their 1968 hit "In-A-Gadda-Da-Vida". They are considered a very-early heavy metal band as a result of this song and others like it as well as the title of their debut album, 'Heavy'. Their heyday was the late-60s, but the band has been reincarnated several times with various members. Also known for being the first RIAA certified platinum group, VH1 ranks them as number 19 on their list of top 100 "one hit wonders".