Listen to Rotten to the Core (Karaoke Instrumental Version) (Originally Performed by Descendants) online. Rotten to the Core (Karaoke Instrumental Version) (Originally Performed by Descendants) is an English language song and is sung by Ratchet Instrumentals. Rotten to the Core (Karaoke Instrumental Version) (Originally Performed by Descendants), from the album Ratchet Instrumentals 2015, Vol. 8 (Karaoke Instrumental), was released in the year 2015. The duration of the song is 2:42. Download English songs online from JioSaavn.