There are 6 different groups with this name:
1.) Halloween, an American heavy metal band that formed in 1984. They bill themselves as Detroit's Horror Show. Their carrer spans from 1983 to date. www.halloweentheband.us
2) Italian heavy metal band (1981-1987).
3.) Halloween, a French symphonic prog band. They existed between 1988-2002 and recorded 5 albums. http://www.progarchives.com/artist.asp?id=143
4.) Halloween, an obscure 70's Disco-Band. They only recorded one album, "Come See What's It All About".
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