Fighter bass tab by Christina Aguilera (Ver. 2)

Verse Riff
G|-----------------|-----------------|
D|-----------------|-----------------|
A|-----------------|-5---5-5--8--7---|
E|-0---0-0--0--3---|-----------------|

Pre-Chorus Riff
G|-----------------|-----------------|-----------------|-----------------|
D|-----------------|-----------------|-----------------|-----------------|
A|-----------------|-----------------|-----------------|-----------------|
E|-5-5-5-5-5-5-5-5-|-5-5-5-5-5-5-5-5-|-3---3-3--3--0---|-3---3-3--3--0---|

G|-----------------|-----------------|-----------------|-----------------|-----------------|
D|-----------------|-----------------|-----------------|-----------------|-----------------|
A|-----------------|---------------2-|-3-3-3-3-5-5-5-5-|-2-2-2-2-2-----2-|-3-3-3-3---------|
E|-5-5-5-5-5-5-5-5-|-5-5-5-5-5-5-5---|-----------------|-----------------|---------5-5-5-5-|

Chorus Riff
G|-----------------|-----------------|-----------------|-----------------|
D|-----------------|-----------------|-----------------|-----------------|
A|-----------------|---------------2-|-3-3-3-3-2-2-2-2-|-----------------|
E|-0-0-0-0-2-2-2-2-|-3-3-3-3-5-5-5---|-----------------|-5-5-3-2-0-------|

Bridge Riff (no bass in the original but this fits)
G|-----------------|-----------------|-----------------|-----------------|
D|-----------------|-----------------|-----------------|-----------------|
A|---------------5-|---3-------------|-2-------------3-|---3-----2-------| x2
E|-0---------------|-----------0-0---|-----5-------5---|-----------------|