A surprise from Rihanna might just be the best kind of jolt. Calvin Harris fans got a lot more than they signed up for during the electronic musician’s set at Coachella on Sunday night. Taking a moment from her “Anti” world tour, Rihanna joined Harris for a performance of their 2011 hit “We Found Love,” as documented by one very excited fan — Taylor Swift, who happens to be Harris’ girlfriend.

Swift, who made the festival rounds over the weekend (sporting newly bleached locks), posted an Instagram video of Rihanna and Harris’ set, showing her dancing around with #squad members Swift’s Instagram followers are by now quite familiar with, including the Haim sisters, “Empire” star Serayah McNeill and Lorde. “I’ll NEVER forget this moment,” Swift captioned the video.

Swift and Rihanna — and RiRi’s rumored onetime flame, Mr. Leonardo DiCaprio — had a busy first weekend of the California music festival, making the party rounds Saturday night at Neon Carnival in addition to Harris’ set. Stay tuned for what weekend two brings.