YOU SAID:

Let's go and crash a party down town

INTO JAPANESE

ダウンタウンでパーティーを開きに行こう

BACK INTO ENGLISH

Let's go party downtown

INTO JAPANESE

ダウンタウンでパーティーに行こう

BACK INTO ENGLISH

Let's go to a party downtown

INTO JAPANESE

ダウンタウンのパーティーに行きましょう

BACK INTO ENGLISH

Let's go to a party downtown