"I Believe in a Thing Called Love" is a song by the British rock band The Darkness, released in 2003. The track is known for its catchy melody and upbeat tempo, blending elements of glam rock and pop. It features themes of love and romance, conveyed through playful lyrics and energetic instrumentation. The song gained popularity for its distinctive sound and was a commercial success, reaching high positions on music charts in several countries. Its music video, characterized by vibrant visuals and humorous storytelling, further contributed to the band's recognition and helped establish The Darkness as a notable act in the early 2000s rock scene.