Dark energy of phantom or quintessence nature with an equation of state parameter ω almost equal to -1 often
leads to a finite future singularity. The singularities in the dark energy universe, by assuming bulk viscosity in the framework
of Kaluza-Klein theory of gravitation have been discussed. Particularly, it is proved, that the physically natural assumption
of letting the bulk viscosity be proportional to the scalar expansion in a spatially 5D FRW universe, can derive
the fluid into the phantom region (ω < -1), even if it lies in the quintessence region (ω >-1) in the non viscous case. It is
also shown that influence of the viscosity term acts to shorten the singularity time but it does not change the nature of singularity
in the framework of higher dimensional space time.