Gwen Stefani - Hollaback Girl Chords & Tabs

Personally i Though it was like this

E---------------------------------------------------|
B---7----7----7----7--------------------------------|
G--8----8----8----8---------------------------------|
D-9--9p8--8h9--9p8----------------------------------|
A---------------------------------------------------|
E---------------------------------------------------|
[ Tab from: https://www.guitartabs.cc/tabs/g/gwen_stefani/hollaback_girl_tab_ver_4.html ]
Though This way works too

E---2----2----2----2-------------------------------|
B--4----4----4----4--------------------------------|
G-4--4p3--3h4--4p3---------------------------------|
D--------------------------------------------------|
A--------------------------------------------------|
E--------------------------------------------------|

Though it just depends on prefrence.