  We use gauge theory/string theory correspondence to study finite temperature
critical behaviour of mass deformed N=4 SU(N) supersymmetric Yang-Mills theory
at strong coupling, also known as N=2* gauge theory. For certain range of the
mass parameters, N=2* plasma undergoes a second-order phase transition. We
compute all the static critical exponents of the model and demonstrate that the
transition is of the mean-field theory type. We show that the dynamical
critical exponent of the model is z=0, with multiple hydrodynamic relaxation
rates at criticality. We point out that the dynamical critical phenomena in
N=2* plasma is outside the dynamical universality classes established by
Hohenberg and Halperin.
