This song hasn't been tabbed yet? Whatever....
Standard Tuning
Guitar I: e,B,G,D,A,E Acoustic
Guitar II: e,B,G,D,A,E Electric w/ slight Distortion
Listen for strumming pattern... Following with the Piano.
[ Tab from: http://www.guitaretab.com/w/weezer/207676.html ]
Guitar I:
A D G
e)---0-000-0-----2-22-----3-33-------|
B)---2-222-2-----3-33-----3-33-------|
G)---2-222-2-----2-22-----0-00-------|
D)---2-222-2-----0-00-----0-00-------|
A)---0-000-0--------------2-22-------|
E)------------------------3-33-------|
Guitar II:
e)------------------------------------------------------------|
B)------------------------------------------------------------|
G)------------9--7--6~~---------------------------------------|
D)-------------------------4-------4-4---4-4h5--4-4h5-4h5-5-5-|
A)---0--0-0------------------4-----5-5------------------------|
E)-----------------------------0~~----------------------------|
And that is it. The entire song is just repetition and singing. And a cool bass line.... Peace!