We love a girl with big hair, so we couldn't stop staring at Selena Gomez's voluminous half-up style for her performance on The X Factor last night. Dressed in a sexy leather outfit, Selena took the stage to perform her hit song "Slow Down." But it was her high-teased, curled-to-perfection coif that had us talking. Selena finished the look with bold brows, vampy lips, and inky black nail polish. See the whole look in action below!