After giving planet Earth a quick heads up last week, Busta Rhymes debuts his exciting new collaboration with Eminem, and it doesn't disappoint. Backed by pummeling, House of Pain-sampling production from Scoop DeVille (Kendrick Lamar 'The Recipe,' Vince Staples 'Nate'), the veteran MCs sharpen their lyrical swords for almost six minutes.

"[It] 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," Busta recently told XXL. Sure, like the cover art suggests, it's a showdown for the ages between two of the game's most skilled spitters. But Marshall Mathers has another target in his iron sight on the track: bloggers.

"Me and Bus put it down like a sick pet / You're f---ing with vets dawg, f---ing internet bloggers / 'I sit in front of my computer all day and comment on / Everything, I'm an expert on everything, everything sucks, play the next song' / Guess if I hopped out your freaking laptop, you idiot prick / With Biggie and kicked the living s--- out of you, I'd be dead wrong," Shady raps while saluting another iconic MC.

Available to purchase on iTunes, 'Calm Down' is the lead single off Busta Rhymes' upcoming album, 'E.L.E. 2.' Kanye West, Lil Wayne and Q-Tip are all also expected to make appearances on the sequel to his 1998 LP.

Listen to Busta Rhymes' 'Calm Down' Feat. Eminem