YOU SAID:

I ain't never seen two pretty best friends, there's always on that gotta be ugly.

INTO JAPANESE

私は2人のかなりの親友を見たことがありません、醜いことは常にあります。

BACK INTO ENGLISH

I've never seen two pretty best friends, it's always ugly.

INTO JAPANESE

私は2人のかなり親友を見たことがありません、それはいつも醜いです。

BACK INTO ENGLISH

I've never seen two pretty best friends, it's always ugly.