There are multiple artists using this name.

1) Sleepy Hollow was around since early 1992. A vision of Derek Jones, the front man who sings and writes all the songs. Mark Haemmerle joined him shortly after the decay of Winter Winds, another band he was in before Sleepy Hollow.
Sleepy hollow split in 1999 and re-emerged in 2001 with Mark taking over on vocals. After that, the new line up merged into the band Starcrossed, taking the music into more of a shoegaze dream pop direction and then back to goth.

2) Sleepy Hollow is a heavy / power metal band from New Jersey, United States, formed in 1989. They released a self-titled full-length album in 1991, and returned in 2012 with "Skull 13".

3) Sleepy Hollow is a band formed in 1999 in Lodi, NJ, United States. They play classic metal, with prog rock tendencies and featuring prominent keyboards and acoustic instruments. Their releases include "Soundwell EP", "Goin Over", and "Legend". Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.