Chris Brown co-wrote Rihanna's 'Disturbia'.
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Chris Brown facts: 25 things you didn't know about the 'Go Crazy' singer

19. Chris Brown co-wrote Rihanna's 'Disturbia'.
It's a little known fact that Chris Brown co-wrote Rihanna's 2008 hit 'Disturbia' with Andre Merritt, Brian Kennedy and Rob. A!