  The $m_{\pi\pi}$ spectrum and various angular distributions in $\upss$ are
studied including the effects of the $\pi\pi$ phase shift in the $I=L=0$
channel using the lowest order amplitude in the pion momentum expansion. Our
results are compared with the recent CLEO data, and we find good agreement
except for the $\cos\theta_{\pi}^*$ distributions. We argue that the
$\cos\theta_{\pi}^*$ distribution, contrary to other distributions, is
sensitive to the higher order corrections in the pion momentum expansion. This
argument is supported by using an ansatz for the amplitude which is of higher
order in the pion momentum expansion and still satisfies the soft pion theorem.
