Katy Perry的BILLBORD入榜歌曲盤點 《Starstrukk》《Circle the drain》《Not like the movies》《Who you love》《If we ever meet》《Walking on air》《Thinking of you》《This is how we do》《Birthday》《Unconditionally》《Rise》《Waking up in vegas》《Chained to the rhythm》《Hot n cold》《The one that got away》《Wide awake》《I kissed a girl》《California gurls》《Teenage dream》《E.T.》《Last friday night》《Firework》《Part of me》《Roar》《Dark horse》