Intro
E|-------6-------6-------1-------1-------4-------4-------3-------3----------|
B|-----8---8---8---8---3---3---3---3---6---6---6---6---4---4---4---4--------|
G|---8-------8-------3-------3-------5-------5-------5-------5--------------|
D|--------------------------------------------------------------------------|
A|--------------------------------------------------------------------------|
E|--------------------------------------------------------------------------|
(repeat)

As she starts singing every part gets played 4 times instead of 2:
E|-------6-------6-------6-------6-------1-------1-------1-------1----------|
B|-----8---8---8---8---8---8---8---8---3---3---3---3---3---3---3---3--------|
G|---8-------8-------8-------8-------3-------3-------3-------3--------------|
D|--------------------------------------------------------------------------|
A|--------------------------------------------------------------------------|
E|--------------------------------------------------------------------------|
etc.

The melody played over it:
E|-----------------1---1-------------------1---1----------------------------|
B|---4---4-3---3-4-------4---4---4-3---3-4-------4--------------------------|
G|--------------------------------------------------------------------------|
D|--------------------------------------------------------------------------|
A|--------------------------------------------------------------------------|
E|--------------------------------------------------------------------------|