Rihanna - Umbrella

This is my first chord-submission ever. Keep in mind i'm a complete beginner at guitar, 
I played around with chords and I liked how these chords sounded with this song, gives 
a more soft sound. Maybe not the original key, but let me know what you think, with corrections etc.

VERSE 1

           Am                          C
You had my heart, and we'll never be world apart
           G                              F
Maybe in magazines, but you'll still be my star
           Am                          C
Baby cause in the Dark, You can see shiny Cars
                      G
And that's when you need me there
               F
With you I'll always share
   F
Because

CHORUS

 F
When the sun shines
               C
We'll shine together
                      G
Told you I'll be here forever
                          Am
That I'll always be your friend
                                         F
Took an oath Imma stick it out 'till the end
                                C
Now that it's raining more than ever
                              G
Know that we still have each other
                         Am
You can stand under my Umbrella
                         F
You can stand under my Umbrella
              C
(Ella ella eh eh eh)
            G
Under my umbrella
             Am
(ella ella eh eh eh)
             F
Under my umbrella
              C
(ella ella eh eh eh)
             G
Under my umbrella
               Am
(ella ella eh eh eh eh eh eh)

Then just the same chord-progression for the next verse + chorus!