Comedian gets walloped after trying to flog cat

Katy Perry has been filmed giving fiancé Russell Brand a joke slap across the head.

In a video posted on YouTube, the comedian gets walloped after trying to sell off their new cat Krusty.

Russell, 34, made the clip to plug his one-day pop-up shop Buy Love Here, which will run on Thursday at the Beverly Center in LA.

The store will be like a bring and buy sale, except customers can also barter with their own unwanted goods. 

Russell – who got engaged to Katy, 25, in India on New Year’s Eve – plans to sell off an Adolf Hitler pincushion and a pair of slippers during the event. 

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SEE VIDEO Katy Perry slaps Russell Brand