What callabo in hiphop/rap would you like to see?!

What callabo in hiphop/rap would you like to see?

anyone hasn't done yet..

eminem/lil wayne

kanye west/50 cent

eminem/ludacris

36mafia/eminem

outkast/eminem

kanye west/lil wayne

neptunes/eminem

jayz/36 mafia

nas/36mafia

extra question what would be a callabo you would never expect but could happen?

like alicia keys/lil jon..ha..

6 days ago
i just think eminem is still the best..i know he his laying low..

but eminem callabo with anyone is hott..

6 days ago
eminem ludacris kanye west and lil wayne on same song!!!...

I Agree wit u Eminem, Lil Wayne And Kanye

Dat **** Will Be Fuckin Tight