Update: Voting for season eight of NBC’s “The Voice” has officially concluded. When that final voting deadline arrived at 12PM ET, songs from three of the four hopefuls were positioned in the top ten on the all-genre iTunes single sales chart. Ambiguity exists regarding whether a multiplier bonus will be applied to those songs (the official rules say it will, previous practice says it will not), but there is no uncertainty about the fact that each song sale will count for at least one vote. In addition to signaling a broadly favorable audience reaction, songs that reached the top ten t...