Lindsay's worst nightmare!
In 2007, Lohan had a whirlwind romance with U.K.-based bad boy Calum Best.
And now, eight years later, the 34-year-old son of late Irish soccer star George Best is telling all about his time with the notorious party girl— and it's not pretty!
In his new memoir, Second Best: My Dad And Me, Best claims his tumultuous relationship with Lohan, 28, led to "some of the worst moments of my life."
After meeting in a club one Monday night, the reality star recalls partying with the then-budding actress in London, New York, and Barbados.
"But things aren't so simple, because the two of us together are combustible. At this moment in our lives, we're both a bit nuts," he admits. "We both like to party a lot and it makes things tempestuous."
Best, who admits abusing cocaine and alcohol during that period, confesses he treated the much younger Lohan poorly.
"When we go out I flirt with other girls, sometimes in front of her, and one day she catches me hanging out with another girl in my hotel room," he writes.
After a brief split, the pair got back together. But days later, the party boy says he shared a "debaucherous" night with a woman he identifies as an escort.
To Best's shock, the woman taped the whole affair. A news outlet soon released photos from the scandalous video.
"There's one of me in a towel, one of me doing a line of coke," he writes. "I've been caught on tape with drugs and hookers...I am now really, truly f***ed."
Best says Lohan called him an "a**hole" and kicked him to the curb.
Despite her "mad life," Best still swears Lohan is a "lovely girl."
Should Calum blabbed about his romance with Lindsay? Sound off in the comments.
Watch: Lindsay Lohan Ex-Lover Calum Best Declares Dating Her Was Worst Moment Of His Life