The singer was arrested after she attended Milton Keynes police station in Buckinghamshire voluntarily with her legal adviser at 1.15pm.
The 26-year-old, from Hertfordshire, was charged under the name Amy Civil with a public order offence and common assault following the incident which took place on Saturday, December 19.
The troubled star is said to have launched a physical attack on a member of staff during a performance of Cinderella at the Milton Keynes Theatre theatre.
At the performance the singer was said to have shocked children and parents by shouting 'He's f ****** behind you' and yelling out 'F*** Cinders, Prince Charming, marry me".
Refusing to sit down, she also branded the Ugly Sisters 'b******".
Her outburst was said to have exasperated stars of the show, including Fairy Godmother Anthea Turner, comedian Bobby Davro, playing Buttons, and actor Mickey Rooney, as Baron Hardup.
And later she allegedly launched herself at the front-of-house manager pulling his hair, punching him and kicking him between the legs.
Amy is set to appear at Milton Keynes Magistrates' Court on Wednesday 20 January 2010.
In July of this year, Amy was acquitted of punching a fan in the face at a charity concert.
A Thames Valley Police spokesman said: "A woman from Hertfordshire has today been charged in connection with an assault at Milton Keynes Theatre on Saturday night.
"Amy Civil attended Milton Keynes police station voluntarily with her legal advisor at 1.15pm this afternoon.
"She was formally arrested by officers from Thames Valley Police on suspicion of assault and public order."