Photo via FYF Fest's Instagram

This past Thursday, FYF Fest announced that Kanye West would replace Frank Ocean as the Saturday night headliner. Rihanna was in the front row for the set, and West handed her the mic during "FourFiveSeconds", the pair's collaborative track with Paul McCartney. She then came onstage to perform "All of the Lights". West also brought out Travi$ Scott for "Antidote" and "Upper Echelon". Watch fan-shot clips below.

"FourFiveSeconds":

"All of the Lights":

"Antidote":

"Upper Echelon":