This is what I would play because there really is no bass, just follow the piano thing...
It's really really simple:
G|-------------------------------------------------------------------------|
D|---------------------------------------5---------------------------------|
A|--------------5------------0----3----------------------------------------|
E|--0----3-----------------------------------------------------------------|
But when the real bass comes in it's still really simple:
G|-------------------------------------------------------------------------|
D|-------------------------------------------------------------------------|
A|-------------------------------------------------------------------------|
E|-0------3------5------0--------------------------------------------------|
And then that syth. break I'm not sure what to do there ha..