What rapper is always cold?
Ice Cube.

What rapper has the best manners?
Nice-T.

What rapper has the worst manners?
The Notorious P.I.G.

What do you call a rapper who likes Pizza?
Chuck D Cheese!

What rapper carries a stethoscope?
"Dr" Dre.

What do you call a rapper with a smooth chin?
Shaver Shav.

What do you call a rapper who is an influential imperative and procedural programming language, designed in 1968/9 and published in 1970 by Niklaus Wirth?
Dizzee Pascal.

Which rapper is prone to bronx cheers? 
Kool Queef.

Which rapper always throws away 4 cans of beer?
2Pac ("two-pack" [he threw away 4 cans from a six-pack of beer]).

Which rapper has a large lumpen head and is used to bang in nails?
50 Cent.

EDIT: By the way, you can now buy a CD I did the artwork for from the label's website, here! Neat!