Why did Justin share it with Selena?

What a perfect couple Selena Gomez is, one is a pop star and the other is an active amphibious star of film and television songs. However, the golden couple, such a perfect match, has spread the news of breaking up. Why? The grandiose reason is to gather less and leave more. Less grandiose is that Justin, who has a "criminal record", "hooked up" with Victoria's secret underwear model, which made Selena unable to trust her boyfriend any more, so she broke up.