Full show replay: http://urlmin.com/grammyz Katy Perry presents at the 55th GRAMMY Awards 2013 Katy Perry presents at the 55th GRAMMY Awards 2013 Katy Perry presents at the 55th GRAMMY Awards 2013 Katy Perry presents at the 55th GRAMMY Awards 2013 Katy Perry presents at the 55th GRAMMY Awards 2013 Katy Perry presents at the 55th GRAMMY Awards 2013
