It’s no secret that Taylor Swift will do anything to surprise her fans, even if it means bringing another celebrity on stage with her at one of her concerts.
The song is infectious and quite a different sound from Nelly, but we love it.
Apparently so does Taylor.
St Louis, you were insanely loud and fun and amazing. Thanks for coming, guys. And a huge thank you to @nelly_mo for coming out to sing!!!
— Taylor Swift (@taylorswift13) March 20, 2013