First half (6/8 with two beats to the bar):

One  two   three        Four  five  six
I      want   to            be     in    A-

Second half (6/8 with three beats to the bar)

One two Three four Five six)
me            ri              ca

O-kay-by-me-in-A
me--ri--ca--

Ev-ry-thing's-free-in-A
me--ri--ca--

(For-a-small-fee-in-A
me--ri--ca--!)

Just before she starts singing they clap out the rhythm.

Don't fight forces, use them R. Buckminster Fuller.

http://www.youtube.com/watch?v=BSsMGNwYDdg

I'd call that an eight--following my theory.  All the counting, though, it can depend--if you count quick enough it'll be four fours; if you count slow enough it'll be a single four...same with the threes--minuets are in sixes, I look up a minuet by Bach--and the time signature is 3/4--(playing one melody line across two bars instead of keeping it all in one bar)

Don't fight forces, use them R. Buckminster Fuller.