Pop acts have been releasing double albums since Bob Dylan's Blonde on Blonde in 1966. There have been countless classics since then, from The White Album by the Beatles all the way to Reflektor by Arcade Fire.
So we have a question for you: What is your favorite double album? We're going to count anything that was originally released on two vinyl records or two CDs. (Some releases, like London Calling and Exile on Main Street were two records, but fit onto a single CD. Those will obviously count.) There's a ton to pick from, including Pink Floyd's The Wall, Genesis' The Lamb Lies Down on Broadway and OutKast's Speakerboxxx/The Love Below.