  The Drell-Yan differential cross section is measured in pp collisions at
sqrt(s) = 7 TeV, from a data sample collected with the CMS detector at the LHC,
corresponding to an integrated luminosity of 36 pb^{-1}. The cross section
measurement, normalized to the measured cross section in the Z region, is
reported for both the dimuon and dielectron channels in the dilepton invariant
mass range 15-600 GeV. The normalized cross section values are quoted both in
the full phase space and within the detector acceptance. The effect of final
state radiation is also identified. The results are found to agree with
theoretical predictions.
