centered text in sticky labels package

By default, the labels are typeset ragged right and the end of line means \newline. So just using \centering instead of \raggedright is not sufficient and we need to issue \par when a line ends.

\documentclass{article}
\usepackage{labels}
\usepackage{xpatch}
\makeatletter
\xpatchcmd{\start@@label}{\raggedright}{\centering}{}{}
\def\start@newline{\par}%
\makeatother

\begin{document}
\begin{labels}
Me
My address
My City, State, Zipcode

My Brother
His address
His City, State, Zipcode

You
Your address
Your City, State, Zipcode
\end{labels}

\end{document}

\documentclass{article}
\usepackage{labels}
\usepackage{xpatch,ragged2e}
\makeatletter
\xpatchcmd{\start@@label}{\raggedright}{\Centering}{}{}
%\xpatchcmd{\end@@label}{\end{minipage}}{\par\end{minipage}}{}{}
\makeatother
\begin{document}
\begin{labels}
Me
My address
My City, State, Zipcode
My Brother
His address
His City, State, Zipcode
\end{labels}

\end{document}

You will get badboxes, I hope you can live with it.