After stops in Milan and Paris, the "Incognito" exhibition of Persol sunglasses has landed at the Whitney Museum of Art’s sculpture garden, and we asked celebrities at the opening how they stay out of sight. Liev Schreiber said he can float under the radar as long as he leaves his toddler at home. "I am convinced that the source of all my paparazzi angst is my son, Sasha," he told us. "Somehow, against my will, he has become this kind of super pseudo-celebrity. If I go out with him, I’m screwed." View more characters who like to stay shady in our Party Lines slideshow.