Bobby Liebling is best known for being the vocalist of the heavy metal band Pentagram. Before Pentagram Liebling was a member of the band Shades of Darkness. In 1971 he came together with Geof O'Keefe to form the new band Pentagram. Liebling is the subject of the documentary film Last Days Here which features interviews with prior members of his band and his parents and friends. Pentagram released their self-titled debut studio album in 1985 and has released a total of seven studio albums.