As you've likely seen and heard by now, Taylor Swift has spent the last several months of her 1989 tour visiting multiple cities and singing various duets on stage.
But the superstar mixed it up a bit in St. Louis.
Along with the the Haim sisters – Este, Danielle, and Alana - Swift only sang parts of Nelly’s classic hit “Hot in Herre.” She spent most of the performance shaking what her mama gave her a sexy backup dancer.
“The highlight of our friendship thus far @HAIMtheband. PS WE LOVE YOU @Nelly_Mo,” Swift tweeted along with a link to the video.
It's a must-watch. Check it out here.