"Halelujah" by K-OS
the Chords used repeatedly are Bb and Dm
So it would go something like this
4/4 Time /=1 beat
Bb Dm Bb Dm
//// //// //// ////
Bb:[1 1 3 3 3 1]
Dm:[x 0 0 2 3 1]
[ Tab from: http://www.guitaretab.com/k/k-os/54906.html ]
If you want to solo over the song use the Am Penatonic or the Bb Major Scales.
Bb Major Scale (7th Position)
|-|1|1|1|-|1| <-7th Fret
Root>|2|2|-|-|2|2|
|-|-|3|3|-|-|
|4|4|4|4|4|4|
Am Penatonic Scale (5th Position)
Root>|1|1|1|1|1|1|
|-|-|-|-|-|-|
|-|3|3|3|-|-|
|4|-|-|-|4|4|