In an exclusive clip obtained by RadarOnline.com, Horn appeared on The Trisha Goddard Show and took a polygraph test to "clear the air" about why she really had surgery, and gave a tearful apology to Lohan.
"Did you have that plastic surgery so you would look like Lindsay Lohan? You said no," Goddard says in the clip.
And it turns out, Horn was being truthful, according to the lie detector test.
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Horn, 18, claims her interview with In Touch magazine -- in which there was a photo spread of her new look -- was taken out of context and she never meant to bring Lohan's name into it, even though she's quoted as saying, "My goal was to look like Lindsay in her good days, when she was around 18, 19 years old."
She now regrets what she said and gave a tearful apology to Lohan.
"Whether she saw it or not, whether she sees this or not, I want to say that I am so sorry for letting the media use me to drag you into this," Horn tells the camera as she holds back tears.
"It was not my intention. I never thought that it was going to end up this way and I am so sorry."
To find out more about why Horn says she actually got the surgery -- and whether or not she paid for it -- tune in to The Trisha Show on Thursday, November 7.
Fun fact: Horn and Lohan's biological father, Michael Lohan, was backstage during the entire taping and an interview with him airs the next day.