Taylor Swift stunned the audience at the second Eras Tour show in London on June 22 by bringing out Paramore’s Hayley Williams to duet their 'Speak Now' vault track 'Castles Crumbling.' Swift also performed 'thanK you aIMee' for the first time, mashing it up with 'Mean.'
https://people.com/taylor-swift-sings-surprise-duet-with-hayley-william…