  We study the hydrodynamics of the high-energy phase of Little String Theory.
The poles of the retarded two-point function of the stress energy tensor
contain information about the speed of sound and the kinetic coefficients, such
as shear and bulk viscosity. We compute this two-point function in the dual
string theory and analytically continue it to Lorentzian signature. We perform
an independent check of our results by the Lorentzian supergravity calculation
in the background of non-extremal NS5-branes. The speed of sound vanishes at
the Hagedorn temperature. The ratio of shear viscosity to entropy density is
equal to the universal value 1/4\pi and does not receive \alpha' corrections.
The ratio of bulk viscosity to entropy density equals 1/10\pi. We also compute
the R-charge diffusion constant. In addition to the hydrodynamic singularities,
the correlators have an infinite series of finite-gap poles, and a massless
pole with zero attenuation.
