Okay, so only part of this song would be perfect for ROTS, so this will be short and most likely won't make sense on paper. Anyway, this song is "The Lady's Got Potential" from Evita.

In 19 BBY there was a military scheme

Behind it was Chancellor Palpatine.

Who did not feel the need to be elected

The clones had themselves a party at the point of a blaster

The Jedi were fast, but the clones were faster

A bomb or two and very few objected

Yeah, just one shell and the Jedi knights fall like flies, kapow, die

They stumble and fall, bye bye

Backs to the wall, aim high

We're having a ball

The tank and blaster rule as liberty dies

The Jedi's got potential, he was setting his sights

OK, he wasn't trained but he had the right friends

And we all know a career depends

On knowing the right fella to be stellar

Yeah, just one shell and senators lose their nerve, kapow, die

They stumble and fall, bye bye

Backs to the wall, aim high

We're having a ball

That's how we get the Empire we deserve

Now the man behind the Emperor calling the shots

Involved so discreetly in a lot of his plots

Was Anakin Skywalker, would be Darth Vader

He began in the Jedi Order on Coruscant so

Saw Palpatine's rise from the very front row

I reckon he'd do likewise sooner or later

Yeah, just one blast and the tear gas falls like rain, kapow, die

They haven't a chance, bye bye

The terrorists advance

But one guy doesn't dirty his hands

Vader was biding his time out in the slow lane

...Eh, well, we all have those days, right?