Exclusive : Taylor Swift debuts ‘thanK you aIMee,’ allegedly about Kim Kardashian feud, live at London Eras concert.

Swift played a mashup of the track from her latest album, “The Tortured Poets Department,” with 2010’s “Mean.”

Never one to let go of a good feud, Taylor Swift revisited her beef with Kim Kardashian during the London stop on her still-ongoing Eras Tour.

“It really makes me think about how every time someone talks s—, it just makes me work even harder and it makes me even tougher,” Swift prefaced the song. “So, it also makes me incredibly thankful for those people.”

Stylized with a not-at-all subtle capitalized K, I, and M, “thanK you aIMee” tells the melodic tale of a school bully, the titular Aimee, whom Swift thanks for helping her build “a legacy which you can’t undo” and how “there wouldn’t be this, if there hadn’t been you.”

Swift then mashed up the newer song with “Mean” from 2010’s Speak Now, aimed at her early critics.

The “Bad Blood” between Kardashian and Swift goes back to the 2009 MTV VMAs when Kardashian’s future ex-husband Kanye West interrupted Swift’s acceptance speech, thus setting off a chain of events now decades in the making.