"It was just destroying her that she said that", she testified.
Swift has been battling it out in court with local radio DJ David Mueller over claims that he grabbed her bare behind during a 2013 meet-and-greet.
Swift told the jury she tried to get as far away from Mueller as she could after the photo.
Coomer said he first heard about Mueller's claim two years after Mueller was sacked from KYGO. Coomer was the person who talked with Bell that night about what Swift said happened then relayed the information to Call.
When the groping occurred, Taylor was standing in between Mueller and his girlfriend for a photo.
"But in his opening statement, Baldridge told jurors that Swift is "absolutely certain" she was sexually assaulted by Mueller, and the photo is "damning" proof of it".
The Denver radio station took the allegations seriously and severed Mueller's $150,000-per-year contract. The trial centers on a photograph in which Swift, Mr Mueller and his then-girlfriend, Shannon Melcher, are seen smiling together backstage at the Pepsi Center.
The pop superstar testified for about an hour on Thursday, sometimes using unflinching language in giving her account of what happened. "I'm not going to let you or your client make me feel like this is my fault".
In a deposition, Swift said that Mueller "took his hand and put it up my dress and grabbed onto my a- cheek and no matter how much I scooted over it was still there".
When she contradicted Mueller's testimony.
Swift adamantly countered that claim in court. Asked whether he grabbed Swift's backside, Mueller replied, "No, I did not". But he insists he was touching Swift in her ribs, not her rear, as she alleges in the groping case. "He grabbed my ass underneath my skirt", Taylor narrated without hesitation. To be frank, lots of people don't believe women who say they've been assaulted and/or abused.
On Friday Swift's former bodyguard testified he saw Mueller each under her skirt a moment before a photographer snapped their picture during a meet-and-greet where the singer says the radio host groped her. He said he and the singer were trying to reach around one another and "our hands touched and our arms touched" during a photo opportunity he estimated lasted no more than 40 seconds. "I wanted to vomit and cry at the same time".
Mueller also testified that one of his station bosses, Hershel Coomer, who is expected to give evidence, told him that he had met Swift earlier before the show and that "he told me that he had his hands on her butt".
This case comes after Mueller sued Swift in 2015, claiming her accusation of him groping her was false and caused him to be fired.
In retaliation to Mueller's lawsuit, Taylor countersued for sexual assault for literally $1 in damages.
"It was a definite grab". Fighting back tears as she spoke in court, she recalled, "I knew what happened, I heard it from her, I heard it from my daughter's mouth".