"A Beautiful Lie" is a song by the American rock band 30 Seconds to Mars, featured on their second studio album of the same name, released in 2005. The track explores themes of deception, longing, and the struggle between reality and illusion. Its powerful lyrics and emotive melodies resonate with listeners, making it a standout piece in the band's discography. The song showcases the distinctive sound of 30 Seconds to Mars, characterized by soaring vocals and anthemic instrumentals. It reflects the band's signature style, blending rock with cinematic elements, and has contributed to their popularity in the alternative rock scene.