The movie 'House of Flying Daggers (<span lang="zh">十面埋伏</span>)' contains a song sung by Zhang Ziyi (<span lang="zh">章子怡</span>) called 'The Beauty Song (<span lang="zh">佳人曲</span>)':
北方有佳人，绝世而独立。 一顾倾人城，在顾倾人国。 宁不知倾城与倾国。 佳人难再得。
Which translates to something like the following:
In the north there is a beauty: Surpassing the world, she stands alone. A glance from her will overthrow a city; A second glance will overthrow the State. Don't I know she can overthrow the city and the State? But such a beauty cannot be found again!
This is a poem by the Han Dynasty poet Li Yannian (<span lang="zh">李延年</span>).