HSN, the leader in multi-channel retail, today announced an exciting new marketing collaboration with Disney to create an exclusive collection of fashions, jewelry, beauty and home accessories based upon one of the most anticipated films of the year, The Walt Disney Studios’ Oz The Great and Powerful.  To promote the collection and the film, HSN has developed a comprehensive 360 marketing campaign that includes a special two-day live event that can be viewed across all of its platforms — TV,…