倾国倾城倾你妹似水柔情似你妈
[qīng guó qīng chéng qīng nĭ mèi sì shuĭ róu qíng sì nĭ mā]
Please note this phrase combines two idioms which describe something overwhelmingly beautiful ('Dazzling Beauty Can Dethrone A Kingdom', 'Topple a City'), but humorously changes the latter part into crass colloquialism ('and Soft-hearted Love Like Your Mom') that might be inappropriate in most contexts.