Swift invited many musicians to join her for one-off duets during the North American tour. Appearances were made by Bieber, McGraw, James Taylor, Jason Mraz, Shawn Colvin, Johnny Rzeznik, Andy Grammer, Tal Bachman, Selena Gomez, Nicki Minaj, Nelly, B.o.B, Usher, Flo Rida, T.I., Jon Foreman, Jim Adkins, Hayley Williams, Hot Chelle Rae, Ronnie Dunn, Darius Rucker, and Kenny Chesney.
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