iTunes, love it or hate it, changed the music industry, and its tenth anniversary is something to take note of. On April 28th, 2003, Steve Jobs revealed the digital music store — and its ¢99 song downloads — alongside the third-generation iPod. Since then, it's gone on to sell 25 billion songs worldwide — and has become the largest retailer of music worldwide. To commemorate the anniversary, Apple has created a timeline of some key events and milestones in iTunes' history, including the top ten songs and albums for each year. Perhaps most striking is how iTunes has shifted from a music store to a hub for many of Apple's digital products. Today, the once-mighty iPod inches closer and closer to obsolescence, and iTunes focuses more on its 40 billion app sales to date.