This has to be the best song on Rock Band - I downloaded it tonight was absolutely blown away not only by the song itself but the amazing job someone did on charting the vocals!
Even Harmonix usually skimps out and makes any rap song talkies, but someone took the time and actually made vocal charting for hip hop that actually works damn good. The song itself is amazing too - good flow to the lyrics and by the second time around I caught on and had a blast.
Even if you're not a fan of hip hop, this is a song that nobody should be missing out on. Again, I'm f'ing speechless!