it don't make any difference to me

问题描述:

it don't make any difference to me
那个 it 不是三单吗?怎么不用doesn't而用don't .本人文化低,问下各位大虾.
那干吗不用they 是一首歌的名字,叫it don't make any difference to me.

我想问一下,这句话的出处.因为据我所知,某些黑人英语有这样不拘泥于语法规则的口语用法.