Singer/songwriter Heidi Merrill filed a copyright infringement lawsuit against Carrie Underwood, NBC and the NFL over “Game On,” the 2018 theme song to Sunday Night Football.

According to the lawsuit, Heidi claims that her song, “Game On,” which she penned with three others in 2016, recorded and posted to YouTube in 2017, is “substantially—even strikingly—similar, if not identical” to Carrie’s version of the song, which was co-penned by Carrie, Chris DeStefano and Brett James.

Heidi also claims she met Carrie’s producer, Mark Bright, at an event in Nashville and pitched the song to him.

Heidi and the co-writers of the song have named Carrie, Mark Bright, NBC, the NFL, Sony Corp., Warner Music Group and more as co-defendants in the lawsuit, which was filed in New York on June 19.

The plaintiffs are seeking an unspecified amount in damages.

Listen to Heidi’s version of “Game On” below.