  In these proceedings, measurements of J/psi polarization in p+p collisions at
200 and 500 GeV via the dielectron decay channel at mid-rapidity with the STAR
experiment are discussed. At 200 GeV the polarization parameter,
$\lambda_{\theta}$, related to the polar anisotropy is obtained in the helicity
frame as a function of transverse momentum, 2 < $p_{T}$ < 6 GeV/c, and compared
to different model predictions. A new J/psi polarization measurement at 500 GeV
extends the previous analysis to a wide transverse momentum range of 5 <
$p_{T}$ < 16 GeV/c. Also, the polarization parameter related to the azimuthal
anisotropy, $\lambda_{\phi}$, is extracted in addition to $\lambda_{\theta}$,
in two reference frames: the helicity and Collins-Soper frames. This allows for
the frame invariant parameter calculation vs $p_{T}$ in these two frames.
