While at war with his ex-fiancée Erin Muller, Michael Lohan has been hanging out with Jon Gosselin‘s ex, Kate Major. Lohan and Major, a former reporter for Star magazine, were spotted at a string of bars in Chicago Sunday night and at an Asian eatery on Tuesday. A spy told us, “They partied until very late Sunday. On Tuesday, they went for dinner at restaurant Sunda and went outside for a cigarette. Kate kept talking about a ring that Michael bought her. She was wearing it on her middle finger. They then got chatting to a girl who looked just like Ali Lohan. Before they went inside, Michael told the lookalike, ‘You are a very beautiful girl.’ ” Lohan told us last night, “Kate and I are friends. She went to Chicago to visit her family after Christmas, and I had business in Chicago.”