Subfigure span the two columns in IEEEtrans style

subfigure_span.tex

\begin{figure*}%
\centering
\begin{subfigure}{.95\columnwidth}
\includegraphics[width=\columnwidth]{tolakpartaipoligami_pie3D.png}%
\caption{\#TolakPartaiPoligami hashtag}
\label{fig:sub1}
\end{subfigure}\hfill%
\begin{subfigure}{.95\columnwidth}
\includegraphics[width=\columnwidth]{sayapilihpks_pie3D.png}%
\caption{\#SayaPilihPKS hashtag}
\label{fig:sub2}
\end{subfigure}%
\caption{Percentage of campaign and real accounts}
\label{fig:hasil}
\end{figure*}