An Associated Press piece looks at the balance fashion houses must strike in the pursuit of increasing sales: How to expand that target market without diluting the brand? It's a lot the challenges musicians face as they attempt to crossover without alienating their core fan base. Some succeed big time -- like Carlos Santana, Pavarotti, and Allison Krauss. Others fail in their crossover attempts and then find that their original fans aren't so quick to welcome them back.

Some industry observers are concerned that top designers have become all-too ubiquitous, licensing their names to cologne and other products outside of the company's traditional scope. And so they're losing their cache.

Is this a concern for shareholders of luxury couturiers like Coach (NYSE: COH)? With newer brands like True Religion (NASDAQ: TRLG) aggressively pursuing licensing deals, should we worry that the company will lose its reputation at a top maker of luxury denim, and better known for licensing its name to any tchotchke it can get a fee for?

When evaluating luxury apparel companies, take a very careful look at the company's efforts to protect its brands. Wall Street's push for quarterly revenue/earnings growth can make just about any new product look tempting to a management team motivated by stock options. But in the long-run, shareholders can only be rewarded if the brand image is managed effectively.