Leonard Cohen to give unforgettable concert at O2 Arena

After years of seclusion, the Canadian poet and songwriter has not just taken to touring again with astonishing energy, but is circling the globe and performing in some cities (like Prague) twice. Fan sites make the concerts sound more like a spiritual experience than a musical outing, with comments like "magical ? unforgettable ? absolutely smitten ? this experience will stay with me forever." No telling if he'll ever do this again, so, if you're a fan, this concert is a must. O2 Arena, Aug. 29 at 8