Vocal trance is a subgenre of trance music. It contains Vocals, highly melodic sessions, intro/outros which are similar to those of hard trance or Progressive Trance and tracks of usually about 6 to 8 minutes long. The sub-genre goes back to the early 1990s, when trance was still developing, and vocals have gone onto become a staple of trance.WTF is vocal trance?
YouTube - Duderstadt and Kirsty Hawkshaw - Beatitude
Vocal trance producers frequently make use of session musicians, particularly females, for vocals on their tracks. Session vocalists have been featured on tracks that span different genres and sub genres, while some vocalists have chosen to work only within the electronic club and dance music genres.
Basically in a nut shell. You have very good female vocalist that sing with the melody of trance music.
Its beautiful music.