John Mayer and Keith Urban

Great music knows no boundaries as Great Britain's premiere arena rock band and a country superstar take the stage together in Nashville. You won't want to miss it as Def Leppard and Taylor Swift collaborate on each others' hits in front of an invitation-only audience. Tune in as the rockers join Swift on chart toppers such as "Our Song" and "Love Story." Also featured are Def Leppard classics including "Pour Some Sugar on Me" and "Photograph."