In reply to Lax.

When any artist can spit the Hook and carry thetune with her vocals and Kanye and Jayz is on the song the rest is
His-To-Rih,,,,
http://www.youtube.com/watch?v=yVA-xTBeHyM

When you are singing on a Hit with the big boys that take the Guess work out of are you a singer, and can you deliver a tune, the proof is in the Pudding.