Ramones and others do the cover of this song.
This is the true song by rivieras. 
They haven't an official website.

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Title     : California Sun
Artist    : The Rivieras
Album     : 
Capo      : I fret
Setting   : E-A-D-G-B-E
Tabbed by : Don D (thunderstruck_666@hotmail.com)
Date      : 18/04/2007
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__________________________________________________________________________________
Capo!!: 1st fret!!! The name of the chords indicate only the position of the hand!
Ex. Capo 1st fret, position hand for D but the chord you're going to play is a D#
__________________________________________________________________________________

FIGURE A
|---------------------8-8-11----|
|-----8--11-11--11-11--------11-|
|-8-8---------------------------|
|-------------------------------|
|-------------------------------|
|-------------------------------|

|-11------8--------|
|----11-8---11-8---|
|----------------8-|
|------------------|
|------------------|
|------------------|