No one could say that Katy Perry is an ordinary artist. Her songs are not just about sweet love and heartbreaks,____usually have bigger themes. Take the songs Firework (2010) and Roar(2013) for example,____Perry sings about being our own master and____(discover) our true value. Earlier this year, she ____ (announce) her new album (专辑) Witness, together with a new idea for W music Perry calls her new style “purpose pop”, meaning a____(society) and political message. It seems that Perry has become tired____ simply encouraging people. Now, she wants to educate them politically as well. The best example of Perry's purposeful pop is____ (probable) the song Chained to the Rhythm, in which Perry criticizes the ____ (behave) that people are unwilling to think more critically (批判的) about the world.

    But when it comes to the concept (概念) of purposeful pop, it is, in fact, something a lot of pop stars have been doing for a while. For example, Beyonce's 2016 song Formation deals with various problems such as an ____ (argue) between white policemen and black citizens (公民) in the US,____ (hope) to create change through music.