Verse
C
e-3/5/3-----------|
B-------5/3-------|
G------------4----|
D-----------------|
A-3---------------|
E-----------------|
e-----------------|
B-3/5/3-----------|
G-------4---------|
D-----------------|
A-----------------|
E-----------------|
Am
e-3/5/3-----------|
B-------5/3-------|
G------------4----|
D-----------------|
A-0---------------|
E-----------------|
e-----------------|
B-3/5/3-----------|
G-------4---------|
D-----------------|
A-----------------|
E-----------------|
Chorus (I'm not really sure about this part)
F Dm
[ Tab from: https://www.guitartabs.cc/tabs/o/omar_rodriguez-lopez/viernes_tab.html ]
e-3-3-3---5-5-5------|
B-3-3-3---6---6------|
G--------(7)-(7)-----| (I'm not 100% sure about this part!)
D--------------------|
A--------------------|
E--------------------|
The part where Ximena goes Hmm Hmmm Hmm Hmmm you can do this just for fun
e-----------------|
B-1-1/3-1/5-------|
G-----------------|
D-----------------|
A-----------------|
E-----------------|
Outro
C - D - D# - F
e-3-5-6-8-11-10-11-13-11-10-8-10-6----|
B-------------------------------------|
G-------------------------------------| X 2
D-------------------------------------|
A-------------------------------------|
E-------------------------------------|
Then Omar plays C and Am really softly.
After that they play the Chorus and then the bass keeps playing C and A for a little bit.
http://omardigital.rodriguezlopezproductions.com/album/ciencia-de-los-inutiles
http://en.wikipedia.org/wiki/Omar_Rodr%C3%ADguez-L%C3%B3pez