In 1998, Dutch musicians Ferry Corsten and Tiësto collaborated to create Gouryella. In time there were twenty separate album releases of the first four Gouryella tracks from nine different record labels. One of those albums was In Search of Sunrise. Gouryella has produced eight tracks: “Gouryella”, “Gorella”, “Walhalla”, “In Walhalla”, “Tenshi”, “Ligaya”, “Anahera” and “Neba”.
After the success of “Gouryella”, Corsten and Tiësto hit the studio together again and came up with their more commercially orientated follow-up single, entitled “Walhalla”. The single, which also included a remix from Armin, as well as Hybrid, was released in September. Complemented with vocals by Rachel Spier, “Walhalla” became again an international success and solidified Gouryella’s status as a production duo. This reputation was backed up when both singles were certified Gold on record sales. On October 24, 1999, Corsten and Tiësto were profiled on an episode of the Dutch TV show Lola da Musica, documenting their gigs in Ibiza and Glasgow, and the making of “Walhalla”.