Listen to It Must Be Believed To Be Seen (from "Charlie and the Chocolate Factory") online. It Must Be Believed To Be Seen (from "Charlie and the Chocolate Factory") is an Instrumental language song and is sung by Guy Dearden. It Must Be Believed To Be Seen (from "Charlie and the Chocolate Factory"), from the album Showstoppers 6 - Musical Theatre Backing Tracks, was released in the year 2021. The duration of the song is 4:33. Download Instrumental songs online from JioSaavn.