If you watch the music video, he doesn't just play one note...

Verse:
G|--------------9--|--------|
D|-----------------|7------4|
A|7------7---------|---5-7--|
E|-----------------|--------|

Chorus:
G|-----------------|-----------------|
D|---------2-------|-----------------|
A|7/12--0-4--------|-----0-2-4-5-6-7-|
E|-----------------|0-2-4------------|

Outro:                       Repeat until fade out
G|-----------------|-----------------:|
D|---------2-------|-----------------:|
A|7/12--0-4--------|-----0-2-4-5-6-7-:|
E|-----------------|0-2-4------------:|