Heidi Montag's song "Fanatic" is an upbeat and energetic track that portrays the singer's intense infatuation with someone. The lyrics describe how the person she is attracted to has a captivating effect on her, making her feel hot and flustered. She compares her feelings to being chased by the paparazzi, highlighting the intensity of her obsession. Heidi sings about her overwhelming desire for this person, expressing how her hands start to sweat and how her thoughts become consumed by him. She feels a deep connection with him and finds it difficult to separate herself from these feelings, describing it as automatic. The chorus emphasizes Heidi's fanaticism and her absolute devotion to this person. She expresses her willingness to go to great lengths for their attention and affection. The song suggests that Heidi is willing to abandon reason and logic for the chance to be with this person. As the song progresses, Heidi's infatuation intensifies. She talks about experiencing a rush of adrenaline and acting impulsively, even staying up until 3 AM just to be closer to this person. The implication is that her obsession has reached a point where it has taken control of her actions. Overall, "Fanatic" explores the overwhelming and sometimes irrational nature of intense infatuation. It portrays Heidi Montag's unyielding desire for someone and the all-consuming effect they have on her emotions.