Dance, dance, dance From top - At left: Samantha Staggard, 11, of Iselin, and Kristiana Still, 11, of Metuchen, limber up as Heidi Grokskreutz, star of the hit Fox show "So You Think You Can Dance" conducts a dance clinic at the Jill Justin Dance Studio in Edison on Oct. 25. Carley Deliman, 9, of Sewaren, stretches. Grokskreutz leads stretching exercises. PHOTOS BY SCOTT FRIEDMAN