Rockschool Acoustic Grade 1 piece, 7 Nation Army.
A great song written by the White Stripes, with Jack White on the guitar and his wife Meg White on the drums. Such an amazing sound with only these two musicians! Mainly down to Jack's amazing riffs and Meg's consistent, but simple, driving beat.
Here's a play through of the piece and a little look at the full lesson that's available from the Premium Lessons section.