Yaaaaah sooo... badass show! To encompass lights, sounds, lighted balls, a stage floor that multidimensionally moved, Lenny Kravitz! Oh! and a moving 10 ft Lion-statue-thing that she stood, which the lyrics states a Tiger's Roar. Nonetheless without the particularities. Well done Miss Perry. Well Done. 

All in all, the engineering effort it took for this show to succeed is definitely extraordinary. Especially the lighted floor, turning into columns that gave the illusion the floor was rising, falling, and or compressing inwards. All in sync and moving with the performer and dancers. Wonderful. Marry me now Katy. lol. 

by: Ryan Quon