Kanye & Rihanna’s Surprise Duet! – ARTICLE

Kanye West didn't need "All of the Lights" to make his last-minute FYF Fest set memorable – special guest Rihanna did that all on her own!

The rapper introduced his pal and collaborator during the Los Angeles event on Saturday night, where, according to concertgoers, their duet may have been impromptu.

Billboard reports that RiRi had been watching the show from the festival pit when Kanye reached into the crowd to hand her a mic.

PHOTOS: The Sexy & Stylish Rihanna

The superstars then doubled up on two of their hits, performing both "All of the Lights" from Kanye's landmark 2010 album "My Beautiful Dark Twisted Fantasy," and their newest track "FourFiveSeconds," which Kanye co-wrote and co-produced with Paul McCartney.

The hip-hop star was there as an eleventh-hour replacement, after former headliner Frank Ocean dropped out on Thursday due to a reported scheduling conflict.

PHOTOS: Power Couple Kim Kardashian & Kanye West

Despite the short notice, Kanye also rounded up plenty of personal support for his appearance. Kim Kardashian brought sisters Kourtney Kardashian and Kendall Jenner to her husband's show, and shared photos on Instagram.

🎶1 good girl is worth 1000 b*tches 🎶

A photo posted by Kim Kardashian West (@kimkardashian) on Aug 23, 2015 at 2:03am PDT

🎶 Damn they don't make 'em like this anymore 🎶

A photo posted by Kim Kardashian West (@kimkardashian) on Aug 23, 2015 at 1:58am PDT

Yeezus

A photo posted by Kim Kardashian West (@kimkardashian) on Aug 23, 2015 at 1:39am PDT

The reality star kept her captions brief, quoting Kanye lyrics for two of the pics and writing a simple "Yeezus" alongside a snap of the rapper on stage.

In addition to finishing up his own next album, Kanye has been at work producing Rihanna's eighth studio effort. 

-- Erin Biglow

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