This can be done w/o capo, but the capo makes it a lot easier.
Capo 1st fret
Verse
e|---3--3--3-2--3---3p2-3p2-3-0---3p2-3p2-3-0-------------------|
B|--------------------------------------------------------------|
G|--------------------------------------------------------------|
D|--------------------------------------------------------------| x4
A|--------------------------------------------------------------|
E|--------------------------------------------------------------|
[ Tab from: http://www.guitaretab.com/k/katy-perry/284569.html ]
Pre-Chorus
e|-3-2-0-3/7-5-3-2---0-3/7-5-3-2-0--0-3/7-5-3-2----0-0-0-0-0-0-0-0-0-0-0-8-7--|
B|----------------------------------------------------------------------------|
G|----------------------------------------------------------------------------|
D|----------------------------------------------------------------------------|
A|----------------------------------------------------------------------------|
E|----------------------------------------------------------------------------|
p=pull off
/=slide
thats all i have for now, maybe you can figure out the rest.
p.s. this is my first tab.
