DIDN'T CHA KNOW by Erykah Badu from the album "Mama's Gun"

Beautiful tune with only two bass patterns. 
Bass enters with F (10th fret, G-string) 
on second beat of first measure.

Play this part during the intro and refrain:
G|---10-------8/10\8-|---10-------8/10\8-|---10-------8/10\8-|---10-------8/10-11-10|
D|--8--8-----8------8|--8--8-----8------8|--8--8-----8------8|--8--8-----8----------|
A|6-----9-6-9--------|6-----9-6-9--------|6-----9-6-9--------|6-----9-6-9-----------|
E|-------------------|-------------------|-------------------|----------------------|

Play this part during the verses:
G|----10h11p10--13-11-10-----|----10h11p10--13-11-10-----|
D|-----------h13---------11--|-----------h13---------11--|
A|--13---------------------13|--13---------------------13|
E|11-------------------------|11-------------------------|

/  slide up
\  slide down
h  hammer-on
p  pull-off