The Platinum Princess is the alter-ego of Britney Britney. She became a villain after Mr. Bickles threw her out of her show in Las Vegas. Since that day she swore that she will end Bickles' career like he ended hers.
The pop diva Britney Britney quickly turned evil when she was thrown out of her performance in Las Vegas to make way for Mr. Bickles' magic show. While the show as in progress, The Platinum Princess blew up part of the stage to make her entrance, and then shot razor sharp platinum records from her wrist at Mr. Bickles.
She is blonde, beautiful, and is wearing a platinum colored mechanical armor that is able to shoot platinum records from a mechanism on the wrist. She wears a platinum mask over her eyes to hide her identity.
The Platinum Princess only made one appearance, at the end of the episode The Masked Magician where she revealed that she was Mr. Bickles' villain.
After this, Britney Britney rarely appears on the show anymore other than references to her going crazy, but she appears to be back to normal after the mishap at the end of The Masked Magician due to Bickles going back to teaching again.