For the most part, the song is in the key of B.
NOTE: THE FOLLOWING IS JUST A GENERAL OVERVIEW OF THE SONG. LISTEN TO 
THE SONG FOR TIMING, NUMBER OF REPETITIONS, AND VARIATIONS. :)

the "give it to me baby" part is: B5 B5-F#5-A5 B5 B5-E5-D5 

the verses are:  
e|---7--7-|
B|---7--7-|  repeat 7x (play in an upstum)

chorus: 
        e|--------------|--------------|------------|-------------|
        B|--------------|--------------|------------|-------------|
        G|--------------|--------------|------------|-------------|
        D|--------------|--------------|-7--7-----7-|-7/9--9--7---|
        A|-9--9-8h9-8h9-|-9--9-8h9-8h9-|-5--5--7--5-|-5/7--7--5--7|
        E|-7--7---------|-7--7---------|-------5----|------------5|
  
        e|--------------|--------------|------------|
        B|--------------|--------------|------------|
        G|--------------|--------------|------------|
        D|--------------|--------------|-7--7-----7-|
        A|-9--9-8h9-8h9-|-9--9-8h9-8h9-|-5--5--7--5-|
        E|-7--7---------|-7--7---------|-------5----|

        e|--------------------|
        B|--------------------|
        G|--------------------|
        D|-7/9--97-----------|
        A|-5/7--75--7/87--5-|
        E|--------------------|

        e|--------------|--------------|------------|-------------|
        B|--------------|--------------|------------|-------------|
        G|--------------|--------------|------------|-------------|
        D|--------------|--------------|-7--7-----7-|-7/9--9--7---|
        A|-9--9-8h9-8h9-|-9--9-8h9-8h9-|-5--5--7--5-|-5/7--7--5--7|
        E|-7--7---------|-7--7---------|-------5----|------------5|

        e|-----------------|-------------|---------------------|
        B|-----------------|-------------|---------------------|
        G|-----------------|-------------|---------------------|
        D|-12--12------12--|-2--2-----2--|-4--4--4-3-2-0---0-4-|
        A|-10--10--12--10--|-0--0--2--0--|-2--2----------2---2-|
        E|---------10------|-------0-----|---------------------|
                      h= hammer on;   /=slide up;   =slide down     

thats' pretty much the whole song. again, listen to the song for timing and repe