December 2006 at the Koko club in London, and a CGI studio in Windsor. It features Mina Caputo of Life of Agony on guest vocals. Fans were allowed to participate in the making of the video, although this first version left the band feeling disappointed (comments made by the band at their March show in Lyon). Shortly after, a completely new video for the song was made. The second single, released across Europe in June, was "Frozen". The video, filmed in Romania, deals with child abuse, and sales of the single was to raise money for a children's charity, Child Helpline International. "The Howling" was chosen as a digital single release for the UK (not to be confused with the US EP release), and another video was also shot. The extended version of the "Frozen" single features an unreleased b-side, "Sounds of Freedom", as mentioned the second song written for the promotion of the computer game The Chronicles of Spellborn. Roadrunner Records also released a limited edition EP called The Howling, which was available only at Hot Topic stores, containing the title track plus popular tracks from their former album The Silent Force. 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 24 July, and the promotional single of "What Have You Done" shipped to rock stations 2 July. 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. In support of the new album, Within Temptation decided to kick off their first headlining US tour in Fall 2007. The band played 13 shows, starting on 5 September 2007, in Boston and ended on 23 September 2007, in Tempe, Arizona. On 19 October 2007, Within Temptation released the video for their third single "All I Need". The single was released in Europe around 12 November and features the single and album versions of the title track plus demo versions of "The Last Time" (previously unreleased track), "Frozen" and "Our Solemn Hour". In November 2007, the band released info that their concert at Beursgebouw, in Eindhoven,