What’s the defining Millennial song?

We weigh the options and attempt to pick the one song that best captures the Millennial experience, from the dizzying highs of the dot-com boom, when anything seemed possible, to the post-9-11 bust, the "hope and change" of the Obama years, and prolonged period of generational disillusionment. NPR Music editors Hazel Cills and Sheldon Pearce join host Robin Hilton. A good review helps! So, leave…