Les plays this song, and most others, with a style called 
'Flamanco Style'. If u want to learn it i can give u a few 
pointers, because with out it, it would be pointless to 
learn this song: 1st: ur going to be using the index finger 
nail to 'down' strum, in this song u play 2 strings at the 
same time, 2nd: as u come down to strum the 2 strings rest 
ur thumb on the fingerboard top, and when u do the 'up' strum 
use the bottom of ur index finger. Bring ur thumb up with ur 
index finger when u do the 'up' strum.

he uses a crunchy distortion on this part with his whammy
   (0:04)     (0:12)----->
G---(0)---|---11h13p--------------------------------------------
D---(0)---|-----------12-13^--(bend up then bend down slowly)---
A---(0)---|-----------------------------------------------------
E---(0)---|-----------------------------------------------------

 d = down stroke with fingernail
 u = up stroke with pads of fingertips
 f = finger (just rest your thumb on the pickup and use ur fingers)

(0:21)
G---4-5-6----------|---4-5-7-6---
D---4-5-6---(6x)---|---4-5-7-6---
A------------------|-------------
E------------------|-------------

(0:29) d u d           d u d               (0:45)
G------4-5-6-----------4-5-6--------7-6-----|--7-6---
D------4-5-6-----------4-5-6--------7-6-----|--7-6---
A---------------0-2-3-----------0-2---------|--------
E-------------3---------------3-------------|--------
              f f f f         f f f d u

(0:48)  *on this part pluck the (0), or smack the fret board*
G---(0)-(0)-(0)-(0)--12/---
D--------------------------
A--------------------------
E--------------------------

(0:54) Verse *keep the same 'down' 'up' 'finger' routine on all parts that look like this through the song*
G---4-5-6-----------4-5-6---------7-6----
D---4-5-6-----------4-5-6---------7-6----
A------------0-2-3-----------0-2---------
E----------3---------------3-------------

(1:27) Chorus("when i grow up i want to be...")
G---4-5-6------------4-5-6--------7-6-----
D---4-5-6------------4-5-6--------7-6-----
A------------0-2-3------------0-2---------
E----------3----------------3-------------

(1:44)
G---4-5-6-----------4-5-6---------7-6----|--4-5-6----------4-5-6-----------7-6---
D---4-5-6-----------4-5-6---------7-6----|--4-5-6----------4-5-6-----------7-6---
A-----------0-2-3------------0-2-------|----------0-2-3----------Drumfill--------
E---------3----------------3-----------|--------3--------------------------------

(2:02) Solo  *play Xtremely fast, use ur fingers*
G---------------------7-6---|----------------------4-5-7-6------
D---------------4-----7-6---|---------------4------4-5-7-6------
A---------0h4h5---5---------|---------0h4h5---5-----------------
E---0h4h5-------------------|---0h4h5-----------0---------------

(2:12)
G--------------------------
D--------------------------
A--------------------------
E---(0)-(0)-(0)-(0)--12/---

Back to Verse & Chorus

(3:25)
G---4-5-6----------4-5-7-6/---
D---4-5-6---(6x)---4-5-7-6/---
A-----------------------------
E-----------------------------

He actually does play the 4,5,and 6's as 'EADG' has them 
but everything else is correct, i thought this way was 
much easier. and Yes ive seen Primus play this song live.