How does one define 2007 in terms of the music it produced? Surely the selections should reflect the events of the year: in this case, record low temperatures, iPhones for everyone, and an over-abundance of celebrity crotch-baring. At the same time, records making the annual list should be timeless; they should be representative not only of yearly trends, but also be able to withstand a 10-year flashback without much embarrassment on the reviewer’s behalf.