U2 frontman Bono has penned a tribute to the late Lou Reed. Writing in Rolling Stone (via NME), he commented on his own experience working with the "Walk On the Wild Side" singer, noting that he was a fan of his deadpan humor: "His deadpan humor was easily misunderstood as rudeness, and Lou delighted in that misunderstanding." Bono also noted that Reed "made music out of noise. The noise of [New York] city," and that the former Velvet Underground frontman was often misconstrued: "It's too easy to think of Lou Reed as a wild creature who put songs about heroin in the pop charts, like some decadent lounge lizard from the Andy Warhol Factory. This couldn't have been further from the truth. He was thoughtful, meditative and extremely disciplined. Before the hepatitis that he caught as a drug user returned, Lou was in top physical condition. Tai chi was what he credited for his lithe physicality and clear complexion."