I don't know the reasoning behind his split but we've seen his embarrassing antics leading up to it. Ever since he's had a smash with 'Blurred Lines', he stopped being a respectable low-key artist and became an artist who thrived on gimmicks just to make headlines.
I honestly believe if 'Blurred Lines' wasn't such a huge hit, his marriage would not have been hit either.
His dalliances with other women, publicly groping one, drunkenly getting close to one at a nightclub, allowing Miley Cyrus to twerk on his crotch and I can go on. It seemed he let the fame and success go to his head. Any woman would throw her hands up eventually and say enough is enough.
I always thought they had an open relationship but everyone has their limits and hers stopped when he started to publicly embarrass her. Still, I hope they can work things out as they’ve known each other forever. After all, you don’t just throw away a relationship like that after being together for so long.