Listen to Who's There? (Halloween Song) online. Who's There? (Halloween Song) is an English language song and is sung by Halloween Music Specialists. Who's There? (Halloween Song), from the album Halloween – Halloween Haunted House Party Music & Scary Horror Sound Effects, Your Perfect Halloween Night Playlist for Halloween Videos and Background Horror Music of the Night, was released in the year 2016. The duration of the song is 3:41. Download English songs online from JioSaavn.