Slipknot is an American heavy metal band formed in 1995 known for their attention-grabbing image of matching uniforms and unique masks, aggressive music style, and energetic live shows. They have sold over 14 million records worldwide and rely heavily on their image and live performances for marketing. The band's controversial image and some lyrical content have been linked to violent incidents but have also gained them exposure among fans who relate to their image. Christina Aguilera's early image was controlled by her management but after taking control she had commercial success with her album Stripped and single "Beautiful," while also endorsing brands to boost recognition throughout her career.