2. Chris Brown
The extremely talented R&B star Chris Brown has spent time at the very top of the charts but has also been very down in the dumps. In 2009, he had an ugly, public falling out with his girlfriend at the time, Rihanna. For the past few years since then, Chris Brown has had to deal with legal frustrations and widespread criticism. In early 2013, he checked into rehab after having a sort of mental breakdown.