Taproot is an American nu metal/alternative rock band. Hailing from Ann Arbor, Michigan, Taproot formed in late 1997, and has toured with Deftones, Sevendust, Incubus, and Korn. Taproot's album "Blue Sky Research" was released on 16 August 2005. Their song "Calling" was the official theme song of WWE's Unforgiven pay-per-view event in September 2005. The second single from the album, "Birthday," received minimal radio airtime on the East Coast.