"In that moment of make-believe the singer seems finally happy, liberated by her ability to become someone else. Even Britney recognizes this about herself. She describes [a song] she wrote last summer, "about artistic expression and the masquerade of people acting and putting on shows," she says. "Through that, you create your own world. The song talks about how other people are coming into this girl's world, but she didn't invite them in. so she's saying, "Why are you here, if I didn't invite you?"