In 2001, along came the iPod. At the same time, iTunes was in the works. The iTunes store opened in 2003. The store sold songs for $1 each. In the store's first three years, it sold more than a billion songs. Suddenly, ear buds and white cords were everywhere. –"Music Gets Personal" Summarize the passage by including the central idea and the most important details.
The iTunes app—which allows users to purchase music—blew up within the first year. As a result, ear buds and other listening devices soon rose in popularity.
