The emotional ballad appears on her double album, "The Tortured Poets Department: The Anthology."
"Happy Bday M8! London shows are off to a splendid start," wrote the pop star. Boyfriend Travis Kelce also posed with them.
"Winds not too Swift and highs of around 'Fifteen' to '22,'” presenter Sabrina Lee quips.
The 24-year-old Eras Tour opener's sophomore album arrives June 21, featuring a duet with that trek's headliner and a sound big enough to fill the stadiums they've been playing together.
"This show feels new to me every time we play it," the pop superstar wrote.
The pop superstar had only performed the Calvin Harris & Rihanna song that she co-wrote twice before: once in 2016 and once in 2017.
"This is the very first time I've acknowledged to myself and admitted that this tour is going to end in December," Swift tells Liverpool crowd during 100th show.
The star also impressed concertgoers by communicating to security in French.
"I can’t thank you all enough," the pop star added.
The couple attended with their three daughters: James, Inez and Betty.
