Just in time for Halloween -- a creepy new couple! Ashley Olsen had been seen around New York with 36-year-old Lance Armstrong! "They came together with a group of friends," a source tells Page Six. "Ashley drank red wine, sat on his lap and they were making out all night. They left together around 2 a.m." Echoes a source for the New York Daily News, "Ashley and Lance settled in and within minutes, he was whispering in her ear and she was giggling like a schoolgirl. They totally looked like they were on a date."

Excuse us while we gag a little…