Dakota Fanning had her first celebrity moment in a California store after moving to the state - when she first met the Toxic superstar.
She says, "I went to a Britney Spears concert with my best friend and her sister. I was so excited!
"(She) was really the first famous person I met when I came to California. I met her in a store when I was six years old, and I was so starstruck by her and I just loved her so much. Getting to go to her Circus tour was like reliving (that)."