Artist: Metallica feat. Ja Rule
Song: We Did It Again
Album G.H.E.T.T.O. Stories
Bassist: James Hetfield

This is the new Metallica song, I guess.  The new Metallica riffs
anyways.  This is actually James on bass for this song.  Which was 
later sampled by Swizz Beatz.

Tuning is down 1/2 step

Intro:
|----------------|----------------|
|--------4-4-----|-------7-7------|  repeat 4 times
|-4-4--7------7--|--4-4------7----|
|----------------|----------------|

Verse:
|----------------|----------------|
|----------------|----------------|
|----------------|----------------|
|-6--8-8-8-8-8-8-|-6--8-8-8-8-8-8-|

|----------------|----------------|
|----------------|----------------|  repeat 4 times
|----------------|----------------|
|-6--8-8-8-8-8-8-|-6-8-5-6-3-5-0-2|

Chorus:
|----------------|----------------|
|--------4-4-----|-------7-7------|  repeat 4 times
|-4-4--7------7--|--4-4------7----|
|----------------|----------------|

After this, these same riffs are repeated with same number of times
The only variations are slight drum dropoffs or a lead guitar part.