  A natural extension of the Pasterski-Shao-Strominger (PSS) prescription is
described, enabling the map of Minkowski space amplitudes with massive spinning
external legs to the celestial sphere to be performed. An integral
representation for the conformal primary wave function (CPW) of massive
spinning bosons on the celestial sphere is derived explicitly for spin-one and
-two. By analogy with the spin-zero case, the spinning bulk-to-boundary
propagator on Euclidean AdS is employed to extend the massive CPW integral
representation to arbitrary integer spin, and to describe the appropriate
inverse transform of massive spinning CPWs back to the plane wave basis in
Minkowski space. Subsequently, a massive spin-$s$ momentum operator
representation on the celestial sphere is determined, and used in conjunction
with known Lorentz generators to derive Poincar\'e symmetry constraints on
generic massive spinning two-, three- and four-point celestial amplitude
structures. Finally, as a consistency check, three-point Minkowski space
amplitudes of two massless scalars and a spin-one or -two massive boson are
explicitly mapped to the celestial sphere, and the resulting three-point
function coefficients are confirmed to be in exact agreement with the results
obtained from Poincar\'e symmetry constraints.
