Listen to Unthinkable (I'm Ready) (Karaoke Version) [Originally Performed By Alicia Keys] online. Unthinkable (I'm Ready) (Karaoke Version) [Originally Performed By Alicia Keys] is an English language song and is sung by Luis and Rita Thyagarajan. Unthinkable (I'm Ready) (Karaoke Version) [Originally Performed By Alicia Keys], from the album Karaoke, Instrumentals, Backing Tracks, Vol. 7, was released in the year 2017. The duration of the song is 4:03. Download English songs online from JioSaavn.