The musical lovebirds, who spent time vacationing in the snow and sun together over the holidays, have broken up, sources confirm to PEOPLE.
News of the couple's demise has been widespread: the New York Post's Page Six reports, citing a source, that after visiting the British Virgin Islands together following a New Year's Eve smooch, Swift left by herself on Jan. 4.
Meanwhile, a photo of Styles in a hot tub with multiple people, including Richard Branson, surfaced Monday.
Reps for both stars have not commented.
Swift, 23, and Styles, 18, debuted as a couple during a taping of The X Factor in November, and were seemingly inseparable after that. They packed on the PDA at a party in New York on Dec. 6, and spent her birthday together visiting northern England.
Although the pair appeared to fall for each other fast, a source who knows Swift told PEOPLE of the romance, "No one is taking it seriously."
Both Swift and the One Direction hottie kick off world tours soon.