While filming a scene for the new comedy This is the End, GQ reports that Michael Cera asked Rihanna if he could slap her butt. The article explains how the singer agreed, but joked that she would slap him harder in return. On the third take Rihanna accidently cupped Michael's ear mid-slap—ouch! Check out our Gotta See it GIF of the Day below and This is the End starting June 12.

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