The happy couple jetted off to Virgin Gorda, one of the British Virgin Islands on January 1, but their tropical vacation didn't last long.
Perhaps Taylor headed home to write a revenge song about Harry?
He is starting off his single life with a bang in the New Year.
"Richard Branson heard Harry was staying nearby so invited him to come check out Necker," the source told Business Insider.
"So when Taylor left for the states, Harry went to Branson's island for the day to let off some steam."
He was only on Necker for a short time, and returned to Virgin Gorda, where "he did plenty of partying and was definitely enjoying himself while hanging out with guests. He returned to Virgin Gorda in the early morning hours looking like he had a raucous night."
Taylor, who ended her summer romance with Conor Kennedy before dating Harry, cryptically Tweeted "…til you put me down," on January 5, but hasn't confirmed whether she and Harry are dunzo.
What do you think Taylor will write about this breakup? Tell us in comments!