Swift says a radio DJ by the name of David Mueller groped her backstage at a 2013 concert.
A photograph, which Swift’s lawyer’s call “damning” proof, will be shown as evidence, according to reports.
Swift claims he “took his hand and put it up my dress.”
Mueller is suing the “Shake It Off” singer for $3 million, claiming he was fired and can't get a new job because Swift is "falsely accusing” him of "inappropriately touching" her.
The Grammy winner is countersuing for assault.