Here’s one last, excellent Hamptons gossip item to close out the summer: An unnamed Water Mill resident was awoken in the middle of the night recently by an exclusive Alicia Keys party going on in her own house, “Page Six” reports. Keys, husband Swizz Beatz, and posse were renting in the neighborhood but had become “confused” and come home to the wrong house. The resident assumed the noise was coming from her twentysomething daughter and her friends, who had gone out earlier, but instead it was “a number of strangers, men and women” in her kitchen. “She was startled.” Luckily, “All parties saw the humor in the mishap” and no parties got shot. Could have happened to anyone.