Earlier in the week, we mentioned that Gap and iTunes were collaborating on a unique marketing campaign: try on a pair of Gap jeans, and win a free iTunes download. Well, it turns out that the campaign was not so unique after all: "The Gap's move comes as phone giants, car makers and even drug companies are leveraging the ability to offer free music in marketing campaigns designed to reach young consumers."

According to the New York Post, a host of other companies - including Differin skin cream, Toyota, Wal-Mart and Gillette - have attempted to win over potential customers with free music downloads. The best marketing campaigns, of course, are those that offer iPod shuffles and not just a free song or two...