Rihanna and Coldplay will perform together at next month's Grammy Awards.

The pop star, who is nominated for four Grammys including album of the year for Loud, tweeted the news to her followers Wednesday, calling it "BONKERS."

Coldplay is up for three awards. It's unclear what song the two will perform together, but they collaborated recently on Coldplay's "Princess of China" ...

Coldplay Ft. Rihanna - Princess of China

While it's been reported that Rihanna and Chris Brown are hooking up again, that's far from confirmed ... but they are both expected at the Grammys.

Legendary Beatles frontman Paul McCartney was announced Thursday by The Recording Academy as another performer on the February 12 broadcast.

NCIS: Los Angeles star LL Cool J will host the annual music extravaganza, which will be broadcast on CBS from the Staples Center in Los Angeles.