EXCLUSIVE: I’ve learned that Oxygen has quietly given the green light to Secret Celebrity, a reality series produced by T Group Prods, which Wendy Williams executive produces as part of her first-look deal with the cable network. Per Oxygen’s description when the project was announced in February as being in development, Secret Celebrity features stars in disguise as they surprise unsuspecting fans, friends and family. I hear celebrities who already have filmed episodes of the show include Nick Lachey, Ice-T & Coco and LuAnn de Lesseps, who just signed on to return to The Real Housewives Of New York on sibling Bravo. T Group’s Jenny Daly executive produces with Williams and Gunnar Wetterberg.