Hi. This tab is based on the Minnesota public radio live performance of Saturday by Sparklehorse.

Chords used:

open G:                       G

Special D/F# with no high F#: D* 

e--0--|
B--3--|
G--2--|
D--0--|
A--0--|
E--2--|

open C:                       C

C/F#:                         C/F#

e--2--|
B--3--|
G--2--|
D--0--|
A--0--|
E--2--|

open Em:                      Em

open Am:                      Am

At the chorus Mark plays a little riff off of an open C chord with a 
changing base note:

e-----------------------------|
B-----------------------------|
G------0------0------0------0-|
D----2------0------2------0---|
A--3------2------0------2-----|
E-----------------------------|

G      D*     C
You are a car
G      D*     C
You are a hospital
G              D*
I'd walk to hell and back
D/F#
To see you smile

C chorus riff
On saturday

G      D*   C
You are a star
G      D*           C
You are a sea of air
G               D*   
I play great keyboards
D/F#
Of horses' teeth

C chorus riff
On saturday
On saturday

G       D*                  C
            I'd like to tell you
         Em        D/F#                 Am
How I feel
                   D/F#
I'll probably keep it
           C chorus riff
'til saturday
Oh saturday, saturday
Oh saturday, saturday
Oh saturday, saturday
Oh saturday, saturday
Oh saturday, saturday

Thanks, keep playing guitar, you'll only get better :)

Abraham