Keri Hilson and CiaraAtlanta singers Ciara and Keri Hilson were reportedly involved in a heated exchange during a concert in New York City this past weekend, which resulted in Hilson refusing to perform.

Both singers have had a history of tension, according to gossip blogs. There’s been speculation that the pair have engaged in back and forth disses via music, but it seems their tiff hit the breaking point when they were booked for a show at the same venue on Sunday (August 22) for Power 105.1’s Power Live show at Governors Island.

According to New York’s Daily News, Hilson refused to perform at the concert, following an altercation with Ciara backstage.

Despite the reports, reps for Hilson claim that she wasn’t even at the concert, and Power Live’s Organizers have backed up that claim, contending that Hilson “was unable to perform due to matters out of her own control.”

“Hilson, a professional who has always been a pleasure to work with, and her management, gave Power Live fair warning that she would be unable to perform …” promoters for the event said in a statement. “Any statements or stories made toward issues backstage with any of our performers are false and without merit.”

The paper, however, claims to have obtained a set list for Hilson, which had her scheduled to perform an hour before Ciara.

Tension surfaced between the two singers when Hilson released a remix of her song “Turnin’ Me On”, which many believe contained a diss to both Ciara, despite Hilson denials. From there, Ciara dropped the song, “Basic Instinct (U Got Me),” which was considered a response by fans.

Both Ciara and Hilson have downplayed the rumored beef.