If You Want to be Happy, in C:
Chorus: F G(7) Em C
F G(7) G(7) C
Verse: C C G(7) C
C C G(7) C
Chantilly Lace, in C:
Refrain: G(7) -- C --
G(7) -- C C(7)
F -- C --
G(7) -- C --
The verse (spoken part) is probably done with the same three chords, but it would take some experimentation to work it out. Hope this helps.