Chris Brown and Rihanna Break Up

Chris Brown and Rihanna are over. An E! News source confirmed the duo's split today. The breakup wasn't caused by any cheating, but a "tireless frenzy of are-they-or-aren't-they tail-chasing" wore on them, as did demanding schedules. Rihanna will always love Chris Brown but has moved on from him and is "re-shifting her focus to her career and business ventures."Chris hinted recently that her international tour was tough on him (even if cheating on him with a girl would be okay), while he's been flirting up a storm himself. There is reportedly no other man in the Barbadian beauty's life, or the R&B star's, though he was seen the other night with a mysterious blonde in NYC.
In any case, the timing of the split comes as a surprise if nothing else, since they got back together so publicly and have been so open with their love of late. What do you think about their breakup? Surprised? Sad? Happy?