the one i knew (around 2010-12?) went:
down by the bay with the hanky panky
when the bullfrogs jump from bank to banky
with an A, E, I O U,
i pledge allegiance to the flag
that cody simpson makes me gag!
up, up, 7-up,
now we're drinking 7-up
7-up got the flu, now we're drinking mountain dew
mountain dew fell off the mountain, now we're drinking from the fountain
fountain broke, now we're drinking plain old coke