Apparently, Chris Brown didn’t want anyone to know he was at Rihanna’s birthday party. According to TMZ, the singer was so concerned with keeping it secret that he forced partygoers to sign confidentiality agreements. Brown’s rep later told TMZ that only workers and people trying to take pictures of him were actually asked to sign the agreements. Katy Perry, Bruno Mars, and Chris Martin also made an appearance at Rihanna’s party.
Extra: Rihanna’s cake was in the shape of a giant spliff, and featured an icing figure of the singer straddling on top.
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