What do you get when you combine a band of British rock stars, a Barbadian pop princess, and a bunch of squelchy synths that build to a massive crescendo? "Princess of China," the Coldplay- Rihanna collaboration that will appear on the band's "Mylo Xyloto," of course! The track leaked online on Monday (Oct. 17) after it streamed on the iTunes Store, kicking off a week of free streams from the band's forthcoming fifth album.

Essentially, "Princess of China" is the most epic breakup song in recent memory: after Chris Martin warbles, "Once upon a time, we fell apart/You hold it in your hands, like two halves in your heart," the verse is washed away in a sea of sinister synthesizer and pounding "Woh-oh-oh's." Rihanna then arrives and begins mixing her medieval metaphors, singing, "I could've been a princess, you'd be a king/Could've had a castle on a ring."

Rihanna's New 'Love': U.K. Singles Chart

Coldplay announced the Rihanna collaboration on "Mylo Xyloto," which will be released Oct. 25, after issuing the album's second single, "Paradise," last month. "Paradise" and "Every Teardrop is a Waterfall," the album's first two singles, have sold a combined 1.14 million copies, according to Nielsen SoundScan.

In addition to "Princess of China," Coldplay fans received the news that the band will be performing on "Saturday Night Live" on Nov. 12. Coldplay will also appear on "The Colbert Report" on Thursday, "The Today Show" on Friday and "The Ellen DeGeneres Show" on Oct. 27.