http://picosong.com/V3pR/ (sample, I don't have the full track)
So I'm pretty sure the original song is Chris Brown - Don't Wake Me Up. However I cannot find this particular remix. What makes it worse is that apparently this song has been remixed by everyone and their mother so there are about 1 billion different remixes out there. However most of the ones I've listened to on YouTube and SoundCloud are more EDM/House/Dubstep. This one is a bit more mellow and chill.