Us magazine has an interview with Britney Spears' (former?) nanny and the source says that when Britney is alone with her kids, "she gets overwhelmed. She gets so frustrated when they cry, asking, 'How do I make it stop?' But she loves her kids." And if you've ever wanted to be Britney's nanny here are some of the job requirements.

Personal Over Professional
"Britney didn't ask me one thing about my child-care experience. She only wanted to know about my personal life."

Friend Wanted
"The agency that called me emphasized that Britney was looking for a nanny who was young and hip because they wanted her to interact with people her own age. Basically, Britney wanted a friend."

Comfort With Nudity A Plus
"Britney asked me and one of her nannies to come to her room to watch her try on outfits for a party one night - then she stripped down naked in front of us!"

Must Be Hands-On
"One nanny told me that Britney will hold her kids for 10 minutes and then say, 'I'm done now. You can take them.'"

Don't Be Too Good
"She doesn't like when Sean prefers the nanny, so she fires them and looks for a new one."

Man, that's good parenting. There's no doubt her kids' first words are gonna be "ma ma." Only it'll be directed towards a fire hydrant. Or a toaster. Or any other object or person that isn't actually their mother.