Listen to The Grim Adventure of Billy and Mandy (From "The Grim Adventure of Billy and Mandy") online. The Grim Adventure of Billy and Mandy (From "The Grim Adventure of Billy and Mandy") is an English language song and is sung by Kidstime Party Band. The Grim Adventure of Billy and Mandy (From "The Grim Adventure of Billy and Mandy"), from the album Cartoon Classics, was released in the year 2014. The duration of the song is 0:34. Download English songs online from JioSaavn.