This is a song sung at the end of The Cleopatra Problem.
Cleopatra: Put your arms to the side like a couple of pans and add a little weight to one.
Then a little to the other until it's exact. That's why they call it the balancing act.
Peg: If your scale's uneven..
Cat: ...and starting to tip...
Peg: ...take a little tip from me.
Adjust the weight 'til the arm is straight.
Cleopatra: You can add or subtract.
Cleopatra, Peg, and Cat: With a balancing act!
Cleopatra, Peg, Cat and a Guard: Oo-oo-oo-oo-oo-oo-ooh, do the balancing act.
Dancer: Balance with the dancers on a camel's hump.
Ramone: Balance on a pyramid.
Peg: When you can't afford to guess which is more or less, do the balancing act.
Cat: You'll be glad you did!
Cleopatra: Ay-ay-ay! So whether you're the queen of an ancient land...
Random Man: ....Or a guy who looks like Mack.
Peg: You can balance 'til you drop.
Cat: And that's a fact.
Peg: Now everybody's doing the balancing act.
Peg, Cleopatra, Ramone, Cat and the Guard: Oo-oo-oo-oo-oo-oo-ooh, do the balancing act.