They Dated?! Lance Armstrong's Secret Affair With Ashley Olsen REVEALED In New Tell-All

Sheryl Crow wasn't the only celebrity to be dated -- and duped -- by Lance Armstrong. A new tell-all on the disgraced cyclist, Cycle of Lies, takes an inside look at his secret relationship with a much-younger woman -- Ashley Olsen!

Just weeks after Armstrong broke up with designer Tory Burch in October 2007, he was spotted out on the town in NYC with Olsen.

During one date at the infamous Rose Bar in the Gramercy Park Hotel, "Ashley drank red wine, sat on his lap and they were making out all night," an onlooker told the New York Post at the time. "They left together around 2 a.m." Days later, they were spotted out again dining at the Waverly Inn.

According to the new book, Armstrong, 36, was told not to date the fifteen-years-younger fashionista by handlers who worried how it would affect his image.

One of his long-time friends, and head of Armstrong's Livestrong Foundation, John Korioth "warned the thirty-six-year-old father of three that his May-December romance could damage his cancer work," author Julie Macur writes.

"'Whoa, dude, bad idea,' Korioth said," she claims. "'You've got to put a stop to this right now.'"

Macur claims infatuated Armstrong answered, "She's twenty-one … F**k you."

The relationship would fizzle out in a few months, however, and Armstrong would move on to Kate Hudson.

Did you know they dated? Do you think they made a good match? Let us know in the comments!