In the June Harvard Business Review there was short snippet about the death of the Jingle. The author was saying that music in ads these days are usually co-opted popular music that relies on borrowed interest to help bring attention to the spot. Because of the cost and obstacles in creating original music, more and more companies are looking for ways to use popular songs. Jingles are thought of as old fashion and not on the cutting edge of creativity these days. Look at the Gap ads and Cadillac. The author makes a good point though- Ask anyone over thirty what is in a Big Mac and they can tell you, in fact they will sing it to you. It may not be cutting edge but putting product attribute to lyrics and adding a catchy tune can be a very effective way to raise awareness of your product.