Pop popcorn. In a saucepan, melt butter or margerine. Add marshmallows and mix together until marshmallows are melted. Stir in gelatin mix until well incorporated. Place popcorn in large bowl. Pour marshmallow/butter mixture over the top of the popcorn. Melt chocolate chips and orange juice in a microwave safe bowl, taking care not to burn the chocolate (melt in 30 second increments). Once melted, spoon over popcorn mixture and allow to set.