“Boom Clap” is getting attention again, over a decade later!

The 2014 Charli xcx smash hit, which was featured on the The Fault in Our Stars soundtrack and sailed to No. 8 on the Billboard Hot 100, is growing in popularity again thanks to footage of the Brat superstar performing the track with Taylor Swift on the 1989 World Tour.

Keep reading to find out more…

Fans have been reposting fan footage of the duo performing Charli‘s hit song live from the tour, which they performed together on October 3, 2015 in Toronto, Canada.

Users have been reposting the performance on TikTok and commenting on their respective vocals throughout, as well as commenting on their since-fractured relationship. (See the whole alleged feud explained, from touring together to alleged diss tracks.)

Watch the duet…

Watch the “Boom Clap” music video…

Read the “Boom Clap” lyrics…