Really easy song.
G|-----------------------------------------------------|
D|----------5-5----------------------------------------|
A|---------------5-5--3-3--5-5-3-5---------------------|
E|---1/3-3---------------------------------------------|
That's the main riff, and then at the end of each section in the song there is:
G|---------7-7--5-5------------------------------------|
D|-------------------7-7-------2-2-3-3-4-4-------------|
A|--3/5-5------------------3-3-------------------------|
E|-----------------------------------------------------|
And that's it!