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Key
C
Difficulty
Beginner
Capo
None
Chords
C · G · Am · F
Fireflies Chords – Guitar
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Key
C
Difficulty
Beginner
Tuning
G-C-E-A
Chords
C · G · Am · F
Fireflies Chords – Ukulele
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Key
C
Difficulty
Beginner
Left Hand
Root notes
Chords
C · G · Am · F
Fireflies Chords – Piano
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Key
C
Difficulty
Beginner
Tuning
gDGBD (Open G)
Chords
C · G · Am · F
Fireflies Chords – Banjo
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Key
C
Difficulty
Beginner
Tuning
G-D-A-E
Chords
C · G · Am · F
Fireflies Chords – Mandolin
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Key
C
Difficulty
Beginner
Harp Key
C Diatonic
Chords
C · G · Am · F
Fireflies Chords – Harmonica
Owl City’s whimsical electro-pop hit about imagination and wonder. Beginner difficulty in the key of C.
Dreamy Pop (4/4 Time)
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Tip: Play with a light, bouncy feel. This song has a dreamlike quality — keep the strumming gentle and the chords clean and ringing.
Chords & Structure
Full Song
Verse 1
C
F
Am – G
C
F
Am – G
Chorus
Am – F
C – G
Am – F – C
G – Am – F – C – G
Verse 2
C
F
Am – G
C
F
Am – G
Chorus
Am – F
C – G
Am – F – C
G – Am – F – C
G
Verse 3
C
F
Am
G
C
F
Am – G
Final Chorus
Am – F
C – G
Am – F – C
G – Am – F – C
G
Am – F
C – G – Am – F – C – G
Practice tip: Four chords (C, F, Am, G) throughout. The C-F-Am-G pattern is one of the most popular in pop music. If F is hard, try Fmaj7 (x33210).
Frequently Asked Questions
What chords do you need to play "Fireflies"?
You need 4 beginner-friendly chords: C, G, Am and F.
Is "Fireflies" easy to play on guitar?
It is rated beginner and uses only 4 chords in the key of C, making it a good choice for players at that level.
What key is "Fireflies" in?
It is in the key of C.
Who wrote "Fireflies"?
It was written by Adam Young, and released in 2009.