Because

Main section:

    C#m                       E     A7/5-         G#    
e|---------------|---------------|---------------|----------------|
B|------5--------|------5--------|------4--------|------4---------|
G|----6---6------|----6---6------|----6---6------|----5---5-------|
D|--6-------6---6|--6-------6---6|--7-------7---4|--6-------6---6-|
A|4-----------7--|4-----------7--|6-----------7--|6---------------|
E|---------------|---------------|---------------|------------4---|

    A               C#m               A7                A6
e|----------------|-----------------|-----------------|------------|
B|------5---------|-------5---------|-------8---------|-------7----|
G|----6---6-------|-----6---6-------|-----6---6-------|-----6------|
D|--7-------7---7-|---6-------6---6-|---5-------5---5-|---5--------|
A|------------7---|-4-----------4---|-------------7---|------------|
E|5---------------|-----------------|-5---------------|-5----------|

    D               Dº 
e|------2---------|-------2-1---|
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G|--2-------2---2-|---1---------| - Repete a música inteira
D|0-----------4---|-0-----------|
A|----------------|-------------|
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  "Ahhh, Ahh.. "                  "Because the (etc.)..."

Lyrics (not necessarily in order):
Because the world is round, it turns me on
Because the world is round, ahhh
Because the wind is high, it blows my mind
Because the wind is high, ahhh
Love is old, love is new
Love is all, love is you
Because the sky is blue, it makes me cry
Because the sky is blue, ahhh

Part with "Love is old, love is new...":
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e|----------------|----------------|----------------|--------4-|
B|------2---------|------2---------|------4---------|------7---|
G|----3---3-------|----3---3-------|----5---5-----5-|----5-----|
D|--4-------4---4-|--4-------4---4-|--6-------6-4---|--4-------|
A|------------4---|------------4---|----------------|----------|
E|2---------------|2---------------|4---------------|4---------|