Most Followers on Twitter 2013: Katy Perry is Social Media's Most Popular; Beats Justin Bieber
Katy Perry New Album 2013 - 'Prism' Release Date, Tracklist: Record Debuts at No. 1 on Billboard Top 200
Katy Perry Prism Leak, Tracklist, Download & Album Cover: Two New 2013 Songs Leak Online [LISTEN]
Katy Perry New Album 2013 Release Date: 'Prism' May Have been Inspired by John Mayer
MTV VMA 2013 Performers & Date: Katy Perry Performs 'ROAR' on Awards Night
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