Her last name is Herrera, and she's from Buenos Aires. "I have always danced," says the 20-year-old. "When I was little, I would move the furniture in the living room and dance all the time." At seven she first held on to the barre in front of a wall of mirrors at dance school, learning how to place feet and arms in ballet's five basic positions. With great precociousness she would stand on one foot in an arabesque, from which she could spin in a pirouette. She practiced leaping into the air in glorious jetés. And she practiced falling. She banged her knees and blistered her feet, becoming famous for the pride--even joy--with which she took her lumps. Her father, Alberto, says, "Paloma's love for dance has always been mysterious."