Ms Campbell told The Sun that Britney had been injected four times in the last twelve months with 1-2ml of a saline and Botox solution each time.
"I know the correct amount to give her as I am a trained beautician," she said.
"I'd rather she be perfect and have a little frozen face. Some people say her eyebrows look a little pulled already but they look striking."
Britney received her first Botox treatment as an eight birthday present, and says they "used to hurt" but now she doesn't cry. Ms Campbell said Britney had to be kept home from school with a headache but had otherwise had no reaction to the procedure.
"She also has her virgin wax monthly, which gets rid of her fluffy leg hair and makes sure she wont develop pubic hair in the future," said Ms Campbell.
"It will save her a fortune in waxing when she's older."
Britney also wants breast enhancements and a nose job soon "so that I can be a star," the child said.