Katy Perry and Taylor Swift are in the middle of an ongoing feud and they’re using the gift of music to publicly insult each other.

The “Roar” singer is reportedly planning on calling out Taylor Swift during her upcoming Super Bowl half time performance, according to The Inquisitr.

Katy Perry is reportedly planning on performing her new single “She’s SO Creepy” at the Super Bowl, according to a January 21 report from Life and Style. Perry had reportedly previously revealed that the song is a “thinly veiled attack on Taylor Swift.”

“The song sums up Katy’s feelings about a girl who’s a two-faced creep. It doesn’t take a rocket scientist to figure out she’s talking about Taylor,” explained a source.

The insider continued, “There’s nothing like telling millions of viewers around the world how you really feel about your nemesis. Katy’s message will be heard loud and clear.”

Swift reportedly started the feud with Katy Perry when she released a song titled “Bad Blood” off her new album “1989.” Swift reportedly takes aim at Perry for sabotaging her professional career in the track.

Fans have reportedly speculated that the song may be about Perry dating Swift’s ex-boyfriend John Mayer.

Swift is reportedly expected to keep the feud going with a new song in time for the 2015 Grammy Awards.

“Taylor will no doubt counterattack with another song in no time,” a source revealed, according to HollywoodLife.

The insider added, “Don’t expect her to take this lying down.”