YOU SAID:
its a party in hereeee
INTO JAPANESE
ここでのパーティーだよ
BACK INTO ENGLISH
it's a party here
INTO JAPANESE
ここでパーティーです
BACK INTO ENGLISH
here is the party
INTO JAPANESE
ここがパーティーです
BACK INTO ENGLISH
here is the party
That didn't even make that much sense in English.