There's a lot of movies and books, and news articles about the Queen, but not much songs written about her. So far, I've only found one and it's by Curved Air (band from the 70's), called Marie Antoinette...
http://www.youtube.com/watch?v=mFVn-rmE_zs

Lyrics:
Marie Antoinette
your name's a legend
in this land
treasure for your pleasure
bestowed on favoured gentleman
the people are in arms
marching on the town
they rise -
changing revolution!
"Vive la Nation!"

Marie Antoinette
your shadow's falling
along the land
anger born of hunger
poisons the hearts of your loyal men
fire in their eyes
steel in their hands
they rise -
changing revolution!
"Vive la Nation!"

Clamouring in the square
the rabble have gone insane
they're over the balustrades
defying the cannon fire
they're into the garrison
they murder the noble man
Marie - Antoinette
Marie - Antoinette

We are the people of France
We demand
that the elegant blue-blooded
leeches that bleed us
are taught what it means
to grow fat and not feed us
we are the people of France
you must heed us

Already at the Bastille
the prisoners all run free
they're hammering on the door
Marie Antoinette
they've taken the guillotine
they're coming to take the Queen
Marie Antoinette
the King and the guards
have fled...

Marie Antoinette
your shadow's falling
along the land
anger born of hunger
poisoned your men
they rise -
changing revolution!
"Vive la Nation!"

Another song, not specifically about Marie Antoinette, but she's part of it is "The Ballrooms of Versailles" by Army of Lovers. I found a video on youtube that uses the song as a background, but the video is really really weird. It's called Nazi Gay Day and it has lots of WWII clips and random rainbow flags and stuff. I recommend just putting it on for the music and doing something else. Listen here.

The ballrooms of Versailles
Like dragons riding high
We dance the nights away
Life is glam and gay
Fountains cry tokai
At ballrooms of Versailles
The gardens where we play
The queen has gone astray
Salute Czar Nicolai
The night the party died
At ballrooms of Versailles

Hail Knight in shining armor
The emperor's decree
The clock strikes midnight hour
Arrive from gay Paris
A world of games and duels
And secret go-betweens
Throw marks or pounds or rubels
Pay life to share the scene

The ballrooms of Versailles
Like dragons riding high
We dance the nights away
Life is glam and gay
Fountains cry tokai
At ballrooms of Versailles
The gardens where we play
The queen has gone astray
Salute Czar Nicolai
The night the party died
At ballrooms of Versailles

A court of fallen angels
Below the guillotine
Betrayed by nightly rangers
Doomed unforgiven sin
The struggle of the classes
The birth of bourgeoisie
Beheaded by the masses
My God that queen was me

The ballrooms of Versailles
Like dragons riding high
We dance the nights away
Life is glam and gay
Fountains cry tokai
At ballrooms of Versailles
The gardens where we play
The queen has gone astray
Salute Czar Nicolai
The night the party died
At ballrooms of Versailles
Ballrooms of Versailles
Ballrooms of Versailles
Ballrooms of Versailles

Jucifer did a whole concept album called "L'Autrichienne" that deals with Marie Antoinette and the French Revolution. Really worth checking out!

That sounds really interesting! I'll go and look for it