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2. Rihanna
Rihanna was the self-proclaimed bad-girl of rap, and her reputation stood true due to her never-ending list of controversies. Rihanna struck a fan over the head with a microphone midway through a performance when the fan tried to reach for her hand. In a later interview, Rihanna admitted that the altercation was intentional and that the woman got what she deserved. A year later, Rihanna received a lot of backlash when she trolled a 16-year old fan who had tried to pull off one of Rihanna’s iconic looks.