In the music video "pour it up" you can see Rhianna is wearing very little to almost no clothing. This is a form of objectifying women, she is using her body to make her music video well known and to gain more views. Another reason for her exposing her body is because she knows it will appeal to the opposite sex and will get a good reaction out of men.

Clearly Rhianna feels that in her videos she should only wear little clothing as this is seen throughout all her videos. She is trying to be a very big sex appeal, so if people do not like her music then at least they may like the video.