It's hard to believe that 2005 was ten years ago. Facebook was only a year old. Ugg boots paired with miniskirts were considered the coolest of cool, and the world had yet to read the final Harry Potter book. But 2005 was also a great year for music, with artists of all genres releasing albums that would go on to define their careers. In this day and age, nostalgia is king; so, here is a list of the top five essential pop records that turn 10 years old in 2015.