Taylor Swift Delivers Diss Track Mashup at Cardiff Concert

Fans speculate song choices targeted Scooter Braun on his birthday during the Eras Tour show.

Swift performed a mashup of 'I Forgot That You Existed' and 'This Is Why We Can't Have Nice Things'.
The songs are from her albums 'Lover' and 'Reputation', both associated with her conflict with Braun.
Braun had acquired Swift's former label, Big Machine, leading to a public fallout over her master recordings.
Swifties connected the performance to Braun's birthday and his recent retirement announcement.
Swift has been re-recording her early albums to regain control of her music.