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On Saturday night, Blood Orange (a/k/a Dev Hynes) performed a pair of shows at the Apollo Theater in Harlem with a few special guests. While Ratking, Le1f and Junglepussy were his openers, the main event was Blood Orange and Nelly Furtado.

Before the show, they both tweeted that they’ve collaborated on a cassette called Hadron Collider. The one-track tape was only available for people who attended their Apollo shows. Proceeds from the concerts will benefit the Opus 118 Harlem School of Music.

We r selling our song "Hadron" on cassette 2nite at #Apollo #BloodOrange #analogue #cassette #pink #opus118 #music pic.twitter.com/MkjKeJjUoO

— Nelly Furtado (@NellyFurtado) December 12, 2015

And then we release hadron collider on cassette supporting @opus118. Tonight? Yeah, why not. Les do it. Merch table pic.twitter.com/nCzvSDoUJs

— Nelly Furtado (@NellyFurtado) December 12, 2015

Backstage at the Apollo ready for TWO SOLD OUT shows today, feeling blessed. I'm giving all the money to @opus118 🙄 pic.twitter.com/Xw502eIjpy

— Devonté Hynes (@devhynes) December 12, 2015

In the videos below, you can catch a snippet of Blood Orange and Furtado performing their new song. Other guests include Solange, who came out to do a tribute to Marvin Gaye with Blood Orange. She also performed “Losing You.” Watch them below.

@SaintRecords and @devhynes did an ode to Marvin Gaye at the Apollo theatre and it was magical. ✨✨ pic.twitter.com/KiVt2sn12r

— b (@biancavivion) December 12, 2015

#apollotheater + @devhynes + @NellyFurtado = 🔥🔥🔥🔥🔥🔥 pic.twitter.com/97ra7tbnsm

— #BecauseBryn (@bryn_little) December 12, 2015