Lou ReedDuff McKagan’s column runs every Thursday on Reverb. He writes about what’s circulating through his iPod every Monday.Joy Division, “Atmosphere” (Permanent): This song and this record as a whole always has held a spooky — while beautiful — and very honest place with me. Atmosphere is a spiritual meditation.Kelis, “Milkshake” (Tasty): If hip-hop/urban music has a punk-rock anthem, then it would most certainly be “Milkshake”. I have always really dug how sister Kelis rolls. This chick is a bad-ass!Lou Reed, “I’m Waiting For My Man” (American Poet): I really was a late-comer to the stylings of Lou Reed and even the Velvet Underground for that matter. This Lou Reed track has lately become one of my favorite songs and will stand up to any other genre of music if you have your iPod on shuffle. That is always the test of a good and relevant track to me.