When two pop sensations like Taylor Swift and One Direction's Harry Styles join forces, does the universe implode?
We might find out tonight on The X Factor, because a source close to a contestant tells us that Styles has been spotted hanging out with Swift as she prepares to perform on tonight's live show.
"Harry is there with her now. She is doing rehearsals this afternoon. And he is in her group," the witness tells E! News. "He watched her onstage going through her performance. He was sitting with her mom and the rest of her entourage."