Be careful what you text around singer Niia, an up-and-coming acolyte of Wyclef Jean, who sang on his hit “Sweetest Girl (Dollar Bill)” with Akon and Lil Wayne. When the chanteuse performed at a late-night bash at hip haunt Acme on Wednesday, she composed a spontaneous song by grabbing a guest’s iPhone and using a string of texts as lyrics. The ensuing ode hilariously turned out to be a blow-by-blow account of a booty call, with the phone’s owner at home “watching ‘True Blood’ ” while a would-be paramour was delayed on a bus and desperately desiring alcohol. The party, and an earlier dinner, celebrated MAC cosmetics’ collaboration with fashion line Ruffian. Spotted at the bash were Ruffian designers Brian Wolk and Claude Morais, Lorenzo Martone, Estée Lauder’s John Demsey, Jon Neidich and Elle’s Kate Lanphea
r. Brie Welch and Jennifer Murray, a k a the Kids, DJ’d.