In 2008, a certain pop singer moved to Los Angeles and set up her own creative team named 'Haus of ______.' The team was modeled on Andy Warhol's Factory and they focused on extreme and provocative artistic choices. A year later, a debut album was released by this singer, reaching No. 1 in many countries. What word fills in the blank?

Pop songs have a good rhythm, a catchy melody, and are easy to remember and sing along to.