This isn't the first time the 33-year-old singer has admitted to being a huge fan of the handsome 51-year-old actor.
"The most starstruck I was with was probably Brad Pitt," she told Australia radio show, The Kyle and Jackie O Show, earlier this month. "I saw him probably 10 years ago at the Teen Choice Awards. He had really long hair. I completely died. I ran. I was dressed in high heels [and I ran] towards him! Like an idiot, I ran to him and I was like, 'Oh my God, I'm the biggest fan.'"
"I kind of lost my mind for a second," she recalled. "I was so uncool -- it was probably one of my most uncool moments -- but I got a picture and an autograph … I acted four years old."
Britney certainly has the experience should she ever actually get the chance to be Brangelina's nanny. The "Pretty Girls" singer is a great mom to her own two sons, Sean Preston, 9, and Jayden James, 8. In March, she even revealed she's taking pre-algebra classes in order to help understand her older son's homework.