Turns out, probably nothing (though we love this video of "Harry" getting his revenge!).
No, it appears Harry will likely take the high road, as a source close to One Direction told RadarOnline that his bandmates have "all advised him to be the bigger person and not to wash his dirty laundry in public--it's just tacky and embarrassing."
The source added, "With the media circus that surrounded Harry and Taylor when they were together, the boys were a little miffed that it distracted fans from the band and what they were all about."
Now that Haylor is over, the source said, "there was a sense of relief because they knew that, along with Harry, they could all move on."
The source added, "It's only Taylor now that seems to clinging on to their failed relationship, and Harry has been told to keep his thoughts private."
Do you think Harry will ever discuss Taylor's slam on Hazza during her "We Are Never Ever Getting Back Together" performance?