"Heartthrob" is a song by the American indie pop duo Tegan and Sara, featured on their album of the same name released in 2013. The track showcases a blend of catchy melodies and upbeat rhythms, reflecting themes of love and longing. Its production incorporates electronic elements, contributing to a vibrant and energetic sound. The song received positive reviews from critics, who praised its infectious hooks and relatable lyrics. "Heartthrob" helped solidify Tegan and Sara's place in the indie music scene, appealing to both new listeners and long-time fans. The duo's unique vocal harmonies further enhance the song's emotional impact.