This 'Nightcore' entry is in reference specifically to the Norwegian Duo, Thomas S. Nilsen and Steffen Ojala Søderholm.
Not to be confused with the Nightcore style that has become popular particularly on youtube. Which is the 'Artist' listed here
"Q: Did someone named Nightcore produce all the songs labeled "Nightcore" on YouTube?
A: No. As explained above, Nightcore IS an artist. However, they inspired a style of editing songs that extended way past the amount of songs they edited themselves. Not all of their songs have surfaced on the Internet; the ones that did are listed below.
5 Elements, All I Want For Christmas, Another Night, Astral Plane, Breathe Without You, Dam Dadi Doo, Destiny, Don't Say Goodbye, Don't You, Don't Let Me Down, Du och Jag, Fallin', Feel the Stars, Find My Way To You, Forever, Hater Å Elske Deg, Here In My Heart, History, Into The Sky, Life Is A Mystery, Look At Me Now, Lucky Star, My Name Is Rose, Now I'm Free, Promised Land, Rainbow, Reaching Out, Sending S.O.S., Stop That Time, Ta Sama Chwila, Take Me, Trip 2 Wonderland, Walk Alone, Where Are You Now, Why, Will My Heart Survive, Without You, Wriemia Agniej"
This list is the only songs that are on the internet that are known to be from the Norwegian Duo.