Ok, guys I know it's incomplete, but this is the most accurate bass tab here of I Wonder 
so if you get the rest of the song let me know so I can update. This is just a little 
help. Thank you.

Riff 1 (Intro & Bridge)
G|-----2-4-6-4-2----|
D|-2-4-----------2--|
A|------------------|
E|------------------|

Riff 2 (rest of song)
  A                  Amaj7              D                    E
G|-2-2--22-------2--|-----2-4-6-4-2----|--------------------|----------------|
D|-------------2----|-2-4-----------2--|--------------------|----------------|
A|------------------|------------------|--------------------|----------------|
E|------------------|------------------|--------------------|----------------|