My sister and I finaly figured this out!  I believe I am the first person to
 submit an accurete bass tab for this song!!!

Intro:
x3
G---------------------------------|
D---------------------------------|
A-----------------2-2-2-2-2-2-2-2-|
E-2-2-2-2-2-2-2-2-----------------|

4th time:
G---------------------------------|
D---------------------------------|
A-----------------/14-14-14-14-14-|
E-2-2-2-2-2-2-2-2-----------------|


Main riff:
G--------------------------|
D--------------------------|
A-------7-9---------2-4-0--|
E-7-7-9-----7-2-2-2--------|


"Dust my lemon lies"
G----------------------|
D----------------0-4-0-|
A-----0-4-0--2-2-------|
E-2-2------------------|

Instrumental:
Play intro