Taylor Swift has been hit with a lawsuit from a DJ who alleges he was falsely accused of groping the singer in 2013.

David Mueller, who worked as a radio host in Denver, Colorado, attended a concert by the pop star with his girlfriend, and they were invited backstage where they got a photograph with the Bad Blood hitmaker.

Mueller claims he was later kicked out of the venue by the singer’s security staff after they accused him of “grabbing her butt” when the snap was taken, and the incident led to him being fired from his job, according to TMZ.com. Editors at the website report Mueller is now suing Swift for lost wages. Representatives for the singer had not issued a comment as WENN went to press. The security member accused Mueller of grabbing Swift’s bottom earlier in the night. Security members surrounded the couple, verbally abused them and escorted them to an exit door, according to the suit.

Mueller, who denies the allegations, was fired on June 4, 2013. “Mueller steadfastly maintains that no inappropriate contact of any kind occurred between him and Ms. Swift,” the filing said. The suit claims Mueller lost his job and other prospective business opportunities because of the allegations. Mueller, who has worked in radio for more than 20 years, made a base salary of $150,000 at the time he was fired. His position also came with performance bonuses, product endorsement fees and public appearance fees. Over the course of Mueller’s career he has met and been photographed with “hundreds” of celebrities including Sheryl Crow, Gwen Stefani, Britney Spears, Christina Aguilera, Heidi Klum, Fergie, Mariah Carey, Beyoncé, Jessica Simpson and Jennifer Lopez.