  We have shown in two accompanying papers that, for Einstein gravity, the
graviton multi-point functions are universal in a particular kinematic region
and depend only on the (generalized) Mandelstam variable s. The effects of the
leading corrections to Einstein gravity were shown to be similarly universal,
inducing a specific difference in the angular dependence. Here we show, relying
on the gauge-gravity duality, that the stress-tensor correlation functions of
conformal fluids whose gravitational dual is either Einstein gravity or its
leading correction are also universal. We discuss the possible significance of
these results to multi-particle correlations in heavy-ion collisions. We show
that, to test our ideas, the stress-energy correlation functions have to
measured rather than the standard multiplicity correlation functions. We then
discuss schematically how stress-energy correlations in heavy-ion collisions
can be used to test our findings. We argue that, if these correlations can be
measured precisely enough, they will provide a unique way to probe the
existence of a gravitational dual to the quark-gluon plasma and to determine
its universality class.
