DJ Calvin Harris brought the crowd to a frenzy and brought the first weekend of Coachella to an epic close on Sunday night (April 17.) Harris had the biggest surprise of the night: Rihanna as his special guest.

Rih-Rih emerged and announced "“Coachella, what the f--- is that!" before performing “We Found Love,” her 2011 collab with Harris.

The Scottish DJ was also joined by Big Sean, who performed "I Don’t F--- With You" and "Open Wide;" and who was followed by John Newman, who took the stage with "Blame."

Fans may have already been primed for a big guest star to take the stage with Harris, but most likely expected it would be his girlfriend, Taylor Swift. Swift was spotted jamming in the crowd, however--and even posted video of the performance. The Coachella Festival is off to a noteworthy start, having already featured Kanye West popping up with A$AP Rocky, a semi-reunion of N.W.A. and a Bernie Sanders cameo.

Check out some posted vids of the performance.