  We present predictions for the $e^{+}e^{-}$ event shape angularities at
NNLL$^{\prime}$ resummed and $\mathcal{O}(\alpha_s^{2})$ matched accuracy and
compare them to LEP data at center-of-mass energies $Q=91.2$ GeV and $Q=197$
GeV. We perform the resummation within the framework of Soft-Collinear
Effective Theory, and make use of recent results for the two-loop angularity
soft function. We determine the remaining NNLL$^{\prime}$ and
$\mathcal{O}(\alpha_s^2)$ ingredients from a fit to the EVENT2 generator, and
implement a shape function with a renormalon-free gap parameter to model
non-perturbative effects. Using values of the strong coupling $\alpha_s(m_Z)$
and the universal non-perturbative shift parameter $\Omega_1$ that are
consistent with those obtained in previous fits to the thrust and $C$-parameter
distributions, we find excellent agreement between our predictions and the LEP
data for all angularities with $a\in[-1,0.5]$. This provides a robust test of
the predictions of QCD, factorization, and the universal scaling of the
non-perturbative shift across different angularities. Promisingly, our results
indicate that current degeneracies in the $\{\alpha_s(m_Z),\Omega_1\}$
parameter space could be be alleviated upon fitting these parameters to
experimental data for the angularity distributions.
