Within Temptation started their very first United States tour a few months after the European release of "The Heart of Everything", supporting Lacuna Coil, and appearing alongside In This Moment, Stolen Babies, The Gathering, and Kylesa. The tour, dubbed The Hottest Chicks in Metal Tour 2007, was largely a success. "The Heart of Everything" was then released there on July 24, and the promotional single of "What Have You Done" shipped to rock stations July 2. This was the band's first album to be released in America followed by the previous albums "Mother Earth" and "The Silent Force" a year later.