Hmmmm, what's this CALLED?

Ok, so I was listening to a song called "Glorious" by Andreas Johnson last night, in that song he a String riff that sounds EXACTLY like another song that was very popular a few years ago. The song was a "Dance/Electronica" song I believe, and it was sung by a female with a very high pitched voice, sounded some what altered. But if I remember correctly the chorus went something like "...You know that I will be there by your side..." and so on, I completely forgot the lyrics...but does ANYONE have a clue what that song is?? it was very popular.