Chris Brown
No problems here, what a gem! Just kidding, Chris Brown is one of the most infamous pop stars of the current generation. You might know him for his early 2000s hits, but more likely it's due to his very dismal claim to fame: beating Rihanna. The duo had dated on and off until Brown viciously assaulted Rihanna. She was left bloodied and bruised by her boyfriend, and the media caught it all on camera. His career took quite a turn after that...