A simple CD could never truly capture the manic NYC drag/cabaret act of Justin Bond (who plays Kiki, a sixtysomething wreck of a lounge singer) and Kenny Mellman (her long-suffering accompanist, Herb). But sadly, this recording of their Carnegie Hall concert last September — a so-called farewell show filled with brilliant mash-ups (Eminem and Talking Heads!) and boozy monologues — will have to do. Friends like Rufus Wainwright and Sandra Bernhard show up to pay tribute, and Kiki’s wrenching take on ”Total Eclipse of the Heart” is a knife to the gut. Come back soon, Kiki, we need you.