Although Andre 3000 and Eminem have never worked together, they have declared mutual admiration in the past.

B.o.B. remembers being in the studio with Shady and hearing him geek out about Three Stacks' eclectic flow. [Jump to 3 minutes.]

“I remember when I was in the studio with Eminem and I played Eminem ‘Play the Guitar" And I remember Em being like, ‘You just never know where [André 3000] gonna land at' when I played that.  I know what he meant when he said that.  First of all, you got to put this in perspective. I grew up listening to Eminem ... He in a politically correct society so you can't be Eminem now but it's like he was that n*gga and I was watching him listening to an Andre 3000 verse on my song and he was like, ‘Damn, man. You just never know where he’s gon’ land with the flow.’ And I’m just like, ‘Yo, this is wild to me.'”

What's your favorite Andre 3000 flow?