The Scottish DJ and producer shared a montage video that shows just how he made "Slide."
Frank Ocean and Migos’ Quavo and Offset feature on the track and Calvin has shared just how it came to life.
From the first piano chords to Frank's vocals and adlibs, the video details exactly what goes into producing a hit single and shows that Harris played every instrument used for it.
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People were shocked by the video and shared their love for it online, James Corden included, who quote-tweeted it with the message "love this."
Calvin has even promised to detail each instruments played so fans can learn how to produce the song at home.
"I'll post liner notes for all my songs in 2017 detailing each instrument played so u can recreate my songs live in the comfort ur own home," Calvin tweeted.
It seems that Harris is on a positive flex as he's made promises that all the music he releases in 2017 will make you feel good.
"All my songs in 2017 have been sonically designed to make you feel f**king incredible," he tweeted.
"In 2017 I’m making music to make your soul happy !!!! Not feel good music. Feel INCREDIBLE music."