Rihanna: Live at Coachella with Calvin Harris!

Rihanna rocks out in the audience during the third day of the 2012 Coachella Music Festival at the Empire Polo Field on Sunday (April 15) in Indio, Calif.

The 24-year-old singer joined Calvin Harris onstage to perform “We Found Love” and “Where Have You Been”.

PHOTOS: Check out the latest pics of Rihanna

Ri then joined Katy Perry in the audience to watch the rest of Calvin‘s set.

“This turned out to be one of the best nights of my life,” Ri wrote on her Twitter account. “#BuffaloSoldier #ThugLife #EPIC.”

Also pictured: Rihanna striking a few poses for her Instagram account.

FYI: Rihanna is wearing her favorite Topshop bra top with Levi’s cutoff shorts.

15+ pictures inside of Rihanna performing onstage at Coachella with Calvin Harris…