Sia NARAS performance

SIA'S BACK: Sia has been nominated for a Grammy before, and she's got an excellent shot at picking up another one for her anthem "Chandelier" (Monkeypuzzle/RCA), a big sales and radio hit that also spawned an unforgettable video. Last week, in what may turn out to be aforeshadowing, Sia performed the song at the Recording Academy, once again doing so with her back to the audience, and in this case wailing right into the horn of an oversized Grammy megaphone. Click here to see the perf, for which she paired a black blazer and red heels with her blonde bob. Speaking of which, we have a pretty good idea of what Joe Riccitelli will be wearing for Halloween. (10/21a)