YOU SAID:
party crashed at someone else's celebration
INTO JAPANESE
パーティーは誰かのお祝いに衝突した
BACK INTO ENGLISH
the party collided with someone's celebration
INTO JAPANESE
パーティーは誰かの祝い事と衝突した
BACK INTO ENGLISH
the party collided with someone's celebration
That didn't even make that much sense in English.