First part              
x------------------------------------------------x
x------------------------------------------------x
x------------------------------------------------x
x------------------------------------------------x
x-------------3--------------------3-------------x
x-3------6--3---------3-------6--3---------------x

Second part
x------------------------------------------------x
x------------------------------------------------x
x------------------------------------------------x
x----------------------------------5-------------x
x---------------3--------------------------------x
x--3------6--3------3-------6--3-----------------x 

 F
e|-------1------5------5-----8---------------13-----------------------------|
B|-------1------6------6-----10-----10-------13-----------------------------|
G|-------2------5------5-----10-----10-------14-----------------------------|
D|-------3------3------7-----10-----10-------15-----------------------------|
A|-------3-------------8-----8------12-------15-----------------------------|
E|-------1--------------------------13-------13-----------------------------|

Gm
e|-----3------6---------------10-------15-----------------------------------|
B|-----3------8------8--------11-------15-----------------------------------|
G|-----3------7------7--------12-------12-------0---------------------------|
D|-----5------5------8--------12-------12-------0---------------------------|
A|-----5-------------10-------10----------------1---------------------------|
E|-----3----------------------------------------3---------------------------|

Bb
e|------1---------------6-------10--------10--------------------------------|
B|------3-------3-------6-------11--------11--------------------------------|
G|------3-------3-------7-------10-------10---------------------------------|
D|------3-------3-------8-------8--------12---------------------------------|
A|------1-------5-------8----------------13---------------------------------|
E|--------------6-------6---------------------------------------------------|

C
e|-----0-------3---------------8--------12---------12-----------------------|
B|-----1-------5-------5-------8--------13---------13-----------------------|
G|-----0-------5-------5-------9--------12---------12-----------------------|
D|-----2-------5-------5-------10-------10---------14-----------------------|
A|-----3-------3-------7-------10------------------15-----------------------|
E|---------------------8-------8--------------------------------------------|

This is the basic melody however it does have variations 
throughout the song
e|-------------------||------------------------------------------------------|
B|-------------------||------------------------------------------------------|
G|-------------------||------------------------------------------------------|
D|-------------------||--------------------------5---------------------------|
A|---------------3---||------------3-----------------------------------------|
E|------3---3h6------||---3---3h6---------3-3-3------------------------------

The Gm is the starting chord and tonal center of the song 
The Bb or the C could be walking chords 
or possibly notes leading away from and back to the Gm
The F is played sometimes at the end of the progression 
leading back to the Gm

Lyrics:
When I walk on by, girls be looking like damn he fly
I pay to the beat, walking on the street in my new lafreak, yeah
This is how I roll, animal print, pants out control,
It's real fool with the big afro
They like bruce lee rock at the club

Girl look at that body (x3)
I work out
Girl look at that body (x3)
I work out

When I walk in the spot, this is what I see
Everybody stops and they staring at me
I got passion in my pants and I ain't afraid to show it

I'm sexy and I know it (x2)

When I'm at the moss, purity just can't fight them off
When I'm at the beach, I'm in a speedo trying to tan my cheeks
This is how I roll, come on ladies it's time to Go
We headed to the bar, baby don't be nervous
No shoes, no shirt, and I still get service

Girl look at that body (x3)
I work out
Girl look at that body (x3)
I work out

When I walk in the spot, this is what I see
Everybody stops and they staring at me
I got passion in my pants and I ain't afraid to show it

I'm sexy and I know it (x2)

Wiggle, wiggle, wiggle, wiggle, wiggle yeah (x3)

I'M SEXY AND I KNOW IT...

Girl look at that body (x3)
I work out
Girl look at that body (x3)
I work out 

 Intro
e|--------------------------------------------------------------|
B|--------------------------------------------------------------|
G|--------------------------------------------------------------|
D|-----------------------------------------  E-22--~ 2's not 22-|
A|--------2-----------------------------------------------------|
E|-22-2-5-------------------------------------------------------|

This repeats until the singing starts.
Then play...
e|---------------------------------------|
B|---------------------------------------|
G|---------------------------------------|
D|-------------------4-------------------|
A|----------2----------------------------|
E|-2-2-2--5---2-2-2-2--------------------|

This part is used until repeatedly until
just after the second "I'm Sexy And I Know It"
Which is when it goes-

e|--3-3-3-6-8-3-3-3-3-15-----------------|
B|---------------------------------------|
G|---------------------------------------|
D|---------------------------------------|
A|---------------------------------------|
E|---------------------------------------|

Which repeats until the "I'm sexy and I know it"
after the "Wiggle yeah. It then goes back to the Part
One until it starts the "Girl look at that body" which
is when it goes back too Part Two until that finishes and
it starts Part One which is slightly palm muted until the
song finishes.