Taylor Swift testifies in court

In trial about a 2013 publicity event, the singer details alleged physical contact.

The singer details alleged incident in groping trial.

Taylor Swift took the stand Thursday in her groping trial against former Denver radio host David Mueller.

On the fourth day of proceedings, the 27-year-old pop star testified in U.S. District Court in Denver, insisting that Mueller grabbed her buttock in June 2013 while they were posing for a photo during a pre-concert event.

The Associated Press reported that Swift said: “It was a definite grab. A very long grab,” later noting that someone would have had to have been underneath her to see the actual groping, “and we didn’t have anyone positioned there.” Swift testified she “got as far away from him as I possibly could” after the incident. Her account undercut Mueller’s testimony that he was “jostling” to get his arm around her during the photo op.

Recalling the events at the crux of Mueller’s and Swift’s dueling lawsuits being tried in Denver this week, the singer told Mueller’s attorney that she is “critical” of Mueller “for sticking his hand under my skirt and grabbing my bare ... . ”

Mueller claims that he was fired from his job at country station KYGO and was banned from Swift concerts based on false allegations about the 2013 encounter. In her countersuit, Swift accuses Mueller of sexual assault and is seeking a symbolic $1 in damages.

On Wednesday, Swift’s mother, Andrea Swift, who is also named in Mueller’s $3-million lawsuit, directly accused the former DJ of sexually assaulting her daughter.

A tearful Andrea Swift said, “I knew what happened, I heard it from her, I heard it from my daughter’s mouth. He sexually assaulted her, right there, that guy,” she said during her emotional testimony, pointing at Mueller, according to E! News.

She added that she didn’t want her daughter to “relive this awful moment” and endure the Internet trolling that would likely ensue had it gone public. The incident “shattered” their trust, she said, and resulted in the Swift team changing their approach to meet-and-greets.

Mueller testified on Tuesday that a colleague groped Swift, not him. As he continued his testimony on Wednesday, he said that he had his palm down during the meet-and-greet and recalled only touching the singer’s rib cage with his knuckles, according to AP.

The moment was captured in a photograph in which Mueller and his girlfriend flank the then-23year-old pop star. The picture is a key piece of evidence, and Andrea Swift described how a curve in her daughter’s skirt was a result of Mueller’s hand going behind Swift and grabbing her buttock, the Denver Post reported.

Mueller later told his lawyer that his hand “was not on Taylor Swift’s rear end.”

“Because I was a larger person, I thought it would be a good idea if I closed my hand so I didn’t poke Taylor with my fingers,” Mueller said.