Taylor Swift and Def Leppard got together to perform each other's songs Monday night (Oct. 6) during a taping for the CMT Crossroads concert series. The invitation-only taping took place at the Acuff Theater in Nashville for the show premiering Nov. 7 on CMT. Swift's band and the British rock group simultaneously backed her and Def Leppard lead vocalist Joe Elliott throughout most of the taping. Song selections included Swift's "Picture to Burn" and Def Leppard's "Photograph."