This is Madonna on the dancefloor, letting the rhythms and producers do the heavy lifting while her voice skates over the grooves with a sultry reassurance. Timbaland, the Neptunes, and Nate “Danja” Hills add their production touches, but it’s Madonna’s reflective touch that delivers the somber twists of “Devil Wouldn’t Recognize You,” the nostalgic glaze of “Incredible,” and the “Everybody” tint of “Heartbeat.”