OutKast ? Hey Ya
Tabbed By James Lindsay

basic line
  G     A     C                       E
|-------------------------------------------------------|
|-------------------------------------------------------|
|-------0-2-0-3-3-3-3-3-3-3-3-3--5-5--7-----7-7-----7---|
|-3-3-3---------------------------------0-0-----0-0---0-|

my Bass Line

|-------------------------------------------------------|
|-----------------5----------5--------------------------|
|-------0-2-0-3-3---3-3--3-3---3-5-5-7-----5-7-----7----|
|-3-3-3--------------------------------0-0-----0-0---0--|

fill ideas

|------------------------------------------------------|
|-5---5---------5-5---5-----5--------------------------|
|--------0-2-0------3---3-3---3-5-5--7-----57-----7-7-|
|---3----------------------------------0-0-----0-0-----|

|------------------5----------------------------------|
|------------------------5----------------------------|
|-------0-2-0--3-3---3-3---3--57/5------7-------7----|
|-3-3-3------------------------------0-0---0-0-0---0--|

Ive updated the tab and added in some other fills and stuff. Please feel free to add your own fills based along the basic line.

Ok, cheers to people for help with finding out the effect. Here are a few ideas on what to use:

flanger
chorus and wah wah pedal
zoom 607 pedal

i use the chorus and wah wah, but use whatever feels right for you.