Justin Timberlake does a clever mini Michael Jackson tribute in his new single “Take Back the Night” from “20/20” part 2 due September 30. It comes in at around 2:30 here. Listen — “Wanna Be Starting Something” and a line about “Michael Jackson/can drive you crazy.” Nicely done. Between this single, JT’s first 20/20 album and “Get Lucky,” it’s really the summer of 1978 all over again. Disco lives. I never thought that would happen. But it’s like a breath of fresh air. This reminds me of George Benson’s “Give me the Night.”