Can you sing Cassy O' by George Ezra?
Cassy O' by George Ezra runs C#3 to F#4 (17 semitones), rated easier for karaoke. Hum for 30 seconds to see your exact percent fit before you step up.
Vocal character
booming brisk · baritone, driving strum
Editorial estimate, used as a minor fine-tuning signal alongside your vocal range, not a substitute for hearing the song.
Practice before you pick it.
We do not publish lyrics directly. Find a karaoke version on YouTube, then come back to compare the song against your Vocal ID.
What key is Cassy O' in?
HumMatch's audio analysis reads Cassy O' in D major at 91% confidence and about 98 BPM, a confident read, so the original key shown here is a solid starting point for practice or transposition.
Can I sing Cassy O' at karaoke?
Few entries in pop songs HumMatch tracks stretch as wide as Cassy O': its 17-semitone span lands in the top 79%.
Highest and lowest notes
The available song-fit estimate places the low note around C#3 and the high note around F#4. If either edge feels tense, try a different key.
Vocal style
A baritone would need to stretch for Cassy O''s peak note (F#4), but it lands comfortably for a tenor.
Karaoke difficulty
Compared with the typical pop song HumMatch tracks, Cassy O' scores less familiar for karaoke: 40/100 against a median of 50.
Who it likely fits
Much of Cassy O''s 48/100 karaoke-difficulty rating traces back to a range in the top 79% widest for pop.
Who may struggle
Running at 98 BPM in D major, Cassy O' leans slower compared with a typical pop pick.
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Range Guide
Cassy O' is estimated around C#3 to F#4. Compare that with your Vocal ID before choosing the original key. If your comfortable high note is below the song’s hardest section, try a lower key or one of the safer alternatives below.
Perfect For These Voice Types
A fast strummer for baritones with the agility to bounce between C#3 and F#4.
Best when your Vocal ID overlaps the main melody without strain.
Best For
Road Trip
Upbeat singalong
Practice
Build confidence
Karaoke Night
Room-friendly planning
Songs like Cassy O' you can sing
Range labels come from HumMatch’s researched catalog. Take the free vocal range test to see your % on every one of these.
Easier alternatives
If it feels too low, too high, or too exposed, compare it against your Vocal ID for safer picks.
Explore by voice: More songs for C#3-F#4 voicesSongs for tenor voicePop songs in D major
Song fit FAQ
Cassy O' spans roughly C#3 to F#4: about 17 semitones. Your safest move is to compare that against your own Vocal ID.
Across the 6 George Ezra songs with researched vocal ranges on HumMatch, the sung notes run from F2 to D5, about 33 semitones (roughly 2.8 octaves). See the full George Ezra vocal range guide for voice type and the hardest songs.
Cassy O' scores 48/100 for karaoke difficulty on HumMatch, which rates as easier. Compared with the typical pop song HumMatch tracks, Cassy O' scores less familiar for karaoke: 40/100 against a median of 50.
A baritone would need to stretch for Cassy O''s peak note (F#4), but it lands comfortably for a tenor.
Much of Cassy O''s 48/100 karaoke-difficulty rating traces back to a range in the top 79% widest for pop.
Cassy O' may work at karaoke if the original key sits comfortably for you and you know where the risky chorus or low phrases happen.
Hum 3 notes in HumMatch and compare your Vocal ID against Cassy O', safer alternatives, and higher-risk picks.
Cassy O' by George Ezra is in D major. HumMatch's audio analysis detects this key at 91% confidence, and that score is shown on the page so you know how solid the read is.
Cassy O' runs at about 98 BPM, as measured by HumMatch's audio analysis.
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