And Katy Perry's Witness World Wide promo stayed true to its word when viewers accidentally 'witnessed' a glimpse of the Roar hit-makers pert posterior.
The Part Of Me singer, who moved into an apartment fitted with 42 cameras for the weekend, was enjoying a relaxing massage when she accidentally flashed her bare bottom.
Resting on the massage table covered only by a towel, a naked Katy stirred on her side slightly, revealing a hint of cheek to unsuspecting viewers.
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