WATCH: Taylor Swift and Lisa Kudrow belt out 'Smelly Cat'

WATCH: Taylor Swift and Lisa Kudrow belt out 'Smelly Cat'
Taylor Swift has invited more than a few of her famous friends on stage with her during the L.A. leg of her 1989 tour.

Guests have included Kobe Bryant, Chris Rock, Uzo Aduba, Mary J. Blige and John Legend, to name a few. But T-Swift may have saved the best for last.