  Measurements of strange hadron (K0s, Lambda + anti-Lambda, and Xi+ + Xi-)
transverse momentum spectra in pp, pPb, and PbPb collisions are presented over
a wide range of rapidity and event charged-particle multiplicity. The data were
collected with the CMS detector at the CERN LHC in pp collisions at sqrt(s) = 7
TeV, pPb collisions at sqrt(s[NN]) = 5.02 TeV, and PbPb collisions at
sqrt(s[NN]) = 2.76 TeV. The average transverse kinetic energy is found to
increase with multiplicity, at a faster rate for heavier strange particle
species in all systems. At similar multiplicities, the difference in average
transverse kinetic energy between different particle species is observed to be
larger for pp and pPb events than for PbPb events. In pPb collisions, the
average transverse kinetic energy is found to be slightly larger in the
Pb-going direction than in the p-going direction for events with large
multiplicity. The spectra are compared to models motivated by hydrodynamics.
