Searches for a Light Higgs with CMS

Given that a light Higgs Boson is favored by electroweak precision measurements and LHC's data are becoming sensitive to the SM Higgs' cross section at low mass, the search for SM Higgs in this phase space is very exciting. We report on the search for a low mass Higgs Boson with the CMS detector using the full 2011 dataset extracted from proton-proton collisions provided by LHC at 7 TeV center-of-mass energy. Thanks to the excellent performance of LHC and CMS, this dataset corresponds to approximately 5/fb of data. The di-photon, WW, ZZ, bb and tau tau Higgs' decay channels are sensitive to low mass Higgs (roughly < 150 GeV), and they will be highlighted along with the combined CMS low mass Higgs result.