Listen to I Know You (50 Shades Of Grey) Originally Performed By Skylar Grey online. I Know You (50 Shades Of Grey) Originally Performed By Skylar Grey is an English language song and is sung by DJ MixMasters. I Know You (50 Shades Of Grey) Originally Performed By Skylar Grey, from the album Chart Ringtones #39, was released in the year 2015. The duration of the song is 0:28. Download English songs online from JioSaavn.