"NIGHT" FEVER, UPDATE: Here's your chance to check out Justin Timberlake's "Take Back the Night." The track hit radio today (announced in a very pithy tweet from the RCA star; see below); it's a giddy throwback to Off the Wall-era disco-soul, replete with brass and strings, and the lead track for the forthcoming 20/20 Experience Part 2, which is available for pre-order at iTunes. It's already zoomed to #2 on the album chart there, surprising exactly no one. Also, fans can now purchase both volumes of 20/20 as The Complete Experience for $15.99. With two massive singles from Part 1 and his stellar guest shot on Jay-Z's "Holy Grail" already burning up the airwaves and online outlets, the monster Live Nation Legends of the Summer tour with Jay about to commence and a couple of big movies in the offing, Justin's going to be everywhere. Or more everywhere than usual. In the meantime, "Night" has us dancing at our desks. But you should try not to visualize that. (7/12p)