The league leader of contemporary-art titledom may be the Museum of Contemporary Art in Los Angeles , which segued from deconstructionist chic to rocker sinister to Sunset Boulevard suave in the late 1980 's and the 90 's with '' A Forest of Signs , '' '' Helter Skelter : L.A. Art in the 1990 's '' and '' Hall of Mirrors : Art and Film Since 1945 . ''