In September 2013, Busta Rhymes confirmed the collaboration in an interview with XXL, saying: "I’ve got a six-minute record with Eminem that sounds like we are respectfully trying to battle each other in a way that you probably never heard us battle in our entire careers on a record. So it’s lot of real incredibly golden moments for us on this project." In January 2014, the song's producer Scoop DeVille spoke about the song in an interview with Vlad TV, saying that "That's the next record that's going to, I'd say destroy the streets of New York and Hip Hop in a lot of ways" and "bring back Busta in a major way." He revealed that the song, 6 minutes in length, had been worked on for a long time and was planned to have an accompanying music video as well. In July 2014, during an interview with Power 106, Busta explained that as he and Eminem kept going "back and forth" in a competitive, battling manner, the song went from three minutes and eight seconds to 6 minutes. Busta continued: "We like, 'Yo, listen, it's one thing to say F the rules, but it's another thing to say we're O.D.ing," and called the song a "special," "beautiful piece of art." . In a July 2014, interview with Complex, Busta explained how the song came together. Scoop provided Busta with the instrumental, which Busta "loved". He immediately recorded two 16-bar verses and titled the song "Calm Down". After "marinating" on the song for some time, Busta felt that it "would be an incredible record for Eminem to get on" and called his own manager Chris Lighty, and requested him to arrange a meeting with Eminem's manager, Paul Rosenberg, to whom they gave the song, but were not informed whether Eminem would record for the song. After six weeks, Busta's associate Shaheem Reid reached out to then-Shady Records A&R Riggs Morales, who came by the studio to hear the song, and two weeks later, Rosenberg finally confirmed that " had got the beat and that he’s fucking with it." After a few months, Busta met up with Rosenberg in the studio, where Busta heard Eminem's verse and "was blown away," but was also intrigued that Eminem had a longer, 42-bar verse, which triggered "a competitive process." Busta then wrote a 50 bar verse and flew out to Eminem's studio in Detroit for a mix session, where Eminem heard Busta's new verse, which prompted him to expand his own verse to 60 bars. Busta then expanded his verse to 62 bars, and finally Eminem his own to 64 bars. Busta also spoke about how long it took to finish the song, saying: "It took us about seven months to goback and forth because we still had other commitments and tours to go on. So sometimes I would have to wait a couple of months to get Em’s new adjustment back and vice versa." Busta noted that "It started off from just doing a dope, high energy hip-hop record into us respectfully competing and damn near battling each other" and stated that he and Eminem "bring the best out of" each other and praised Eminem as someone who "genuinely still cares about the music."
Composition and production
"Calm Down" features two lengthy verses by each rapper, both preceded by a chorus. The instrumental is produced by Scoop DeVille and is based around a sample of the introductory horns from the 1992 House of Pain song "Jump Around". The song also includes vocal samples: "Yo, chill man! Chill!" from The Notorious B.I.G.'s 1993 track "Party and Bullshit", "Steady on the right, steady on the left" from Grand Wizzard Theodore and Kevie Kev Rockwell's 1983 "Military Cut - Scratch Mix". In interview with Power 106 on Big Boy's Neighborhood, Busta revealed that the song's mixing and mastering, as well as some additional production, was done by Eminem.
Commercial performance
In its debut week of release, the song sold 40,133 digital copies in the United States and debuted at number 94 on the Billboard Hot 100.
