We all knew TAYLOR SWIFT and HARRY STYLES were destined to crash and burn . . . and we were right. According to several sources, they broke up sometime last week, which puts their relationship somewhere around the two-month mark.

--Here's what happened: They flew to the Virgin Islands TOGETHER on January 1st . . . had a "heated argument" . . . and then broke up. Just like that. Someone even took a photo of Taylor sitting alone on a boat