Susana (http://www.susanalise.com/) has one of the more distinct and powerful voices in EDM. She's worked with a lot of big time Trance producers.
Her work with Rex Mundi (http://www.armadamusic.com/artist/rex-mundi/) on this track is amazing. I am loving this track's powerful vocals, this is a definite vocal trance classic. So far my favorite mix is the Elevation Remix, followed by the Funabashi Uplifting Mix.
I first heard this track on sir Armin van Buuren's A State of Trance podcast it's been included in tons "Best of" compilations. A definite mainstay on anyone's trance playlist.
You can listen to samples and purchase from audiojelly here