This is a new version, using Audacity 2.2.2 for the first time as an Acidhead.
Cut out the strange sounding sung bits, and replaced them with repeats, delays or silence.
Put the vocals through Autotune EVO, after Hornet Songkey gave a best guess of C#m for both sources AND for the combination.
The instrumental is in the original order that fits well with this rap (and others!).
Needed the Autotune plugin, could not get it to work in Acid 7 on my PC. Audacity got some great plugins as well, even 'acapella making'. Also used it for noise reduction (with a noise sample from the track) on another acapella.