Standards

Let's Do It (Let's Fall In Love) chords & key

Key: B♭ major
Form: AABA
Bars: 32
Groove: Medium swing
Time signature: 4/4

“Let's Do It (Let's Fall In Love)” is a jazz standard by Cole Porter. It is usually played in B♭ major as a medium swing, and the 32-bar AABA form has 4 sections. Harmonically it contains 8 major ii–V–I cadences and 2 minor ii–V–i, uses 24 different chords and moves between the key centres B♭ major, C minor, E♭ major and D♭ major. In this atlas it appears on 14 album tracks.

Chord changes

to key

Showing in: Concert (C) — B♭ major

B♭⁶B^dim7

C^m7F⁷

B♭⁶B♭⁷

E♭⁶E♭^m6

D^m7G^7♭9

C^m7F⁷

D^7♯5G^7♭9

C⁹F^7♯5

B♭⁶E♭⁷

B♭⁶D^7♯5

G^m6

C^m7C^m6

D^m7

F^m7B♭^7♭9

E♭⁶

E♭^m7A♭⁷

D♭⁶

C^m7F^7♯5

B♭⁶B^dim7

C^m7F⁷

B♭⁶B♭⁷

E♭⁷

B♭⁶_/DG^m7

C^m7F^7♭9

B♭⁶G^7♯5

C^m7F^7♯5

Changes as commonly played (concert pitch). Your band's version may differ.

Harmonic analysis

8Major ii–V–I

2Minor ii–V–i

12ii–V moves

0Tritone substitutions

4Dominant chains

24Different chords

Most used chords

B♭⁶×9
C^m7×9
F⁷×5
B^dim7×3
B♭⁷×3
E♭⁶×3

Key centres reached by ii–V

B♭ major, C minor, E♭ major and D♭ major

Characteristics

AABA song form

Recorded on these albums

1953	Oscar Peterson Plays Cole Porter Oscar Peterson · “Let's Do It”
1956	Ella Fitzgerald Sings the Cole Porter Song Book Ella Fitzgerald · “Let’s Do It (Let’s Fall in Love)”
1957	Ella and Louis Again Ella Fitzgerald & Louis Armstrong
1977	Tony Bennett / The McPartlands And Friends Make Beautiful Music Tony Bennett · “Let’s Do It”
1993	I Love Paris Ella Fitzgerald · “Let’s Do It, Let’s Fall in Love”
1995	On The Sentimental Side Billie Holiday · “Let's Do It”
1995	Love Me or Leave Me Billie Holiday · “Let's Do It”
2003	Body & Soul Billie Holiday · “Let's Do It”
2004	The Love Songs Billie Holiday · “Let's Do It”
2005	Romance in the Dark, Vol. 1 Billie Holiday · “Let's Do It”
2007	Sings Cole Porter Ella Fitzgerald · “Let’s Do It”
2008	Ella & Louis (and Oscar Too) Ella Fitzgerald, Louis Armstrong & The Oscar Peterson Trio · “Let’s Do It (Let’s Fall in Love)”
2018	Pops Is Tops: The Verve Studio Albums Louis Armstrong · “Let's Do It (Let's Fall In Love) (Breakdowns Including Warm-up)”
2025	Jukebox Ella: The Complete Verve Singles, Volume 2 Ella Fitzgerald · “Let’s Do It (Let’s Fall in Love)”

Standards with similar changes

Similarity of the chord progression, independent of key.

Title	Composer	Key	Form	Groove
Bunko 34%	Lennie Niehaus	F major	AABA · 32	Medium swing
Ain't Misbehavin' 29%	Fats Waller	C major	AABA · 32	Medium swing
Put On A Happy Face 29%	Charles Strouse	E♭ major	ABCD · 32	Medium swing
Broadway 28%	William-Henri-Woode	B♭ major	AABA · 32	Medium-up swing
For Sentimental Reasons 26%	William Best	F major	AABA · 32	Slow swing
You Make Me Feel So Young 26%	Josef Myrow	B♭ major	AABC · 40	Medium swing
Among My Souvenirs 23%	Horatio Nicholls	E♭ major	AABA · 33	Ballad
Crazy Rhythm 23%	Wolfe-Kahn-Meyer	F major	AABA · 32	Up-tempo swing

Frequently asked questions

What key is Let's Do It (Let's Fall In Love) in?

Let's Do It (Let's Fall In Love) is usually played in B♭ major. For B♭ instruments that is C major, for E♭ instruments G major.

Who wrote Let's Do It (Let's Fall In Love)?

Let's Do It (Let's Fall In Love) was written by Cole Porter.

What is the form of Let's Do It (Let's Fall In Love)?

Let's Do It (Let's Fall In Love) has 4 sections (AABA) with 32 bars in total.

How fast is Let's Do It (Let's Fall In Love) played?

The usual groove is Medium swing.

What are the chord changes to Let's Do It (Let's Fall In Love)?

The opening bars are Bb6 Bdim7 | Cm7 F7 | Bb6 Bb7 | Eb6 Ebm6. The full chart above can be transposed to any key.