Rosario Dawson’s mother, Isabel, stole the show when she accompanied her movie-star daughter to Fashion Week bash “The Pharmacy” at newly launched Hudson Common. After Dawson brought out cupcakes for her mom’s birthday and led guests, including Leelee Sobieski and Elsa Hosk, in singing “Happy Birthday,” Isabel grabbed the mike and crooned Kool & the Gang’s “Celebration.” (That was an improvement over Rosario’s own birthday in 2006, when Isabel reportedly got into a punch-up with a guest who bumped into her.) Mentalist Lior Suchard performed tricks for Russell Simmons and rapper Waka Flocka Flame who was overheard saying he was “freaking out” over Suchard’s “powers.”