Premiere Radio Networks has announced that this weekend, a new, three-hour music countdown show backed by Apple will launch, titled The iTunes Download (link not yet functional). The show will be hosted by iTunes' Director of Music Programming, Alex Luke, and be broadcast from Los Angeles to a number of Top 40-format radio stations. The show will air weekly on Saturday or Sunday, and will feature the 30 most downloaded songs in America, as well as interviews with highlighted artists. Luke will also draw attention to celebrity playlists, and iMixes, the playlists shoppers create in the iTunes Store.