Who Is The Artist Of Hey Y'all How You Been Doing Since You Been Filled With The Holy Ghost?

Wanda Nero Butler. It's on YouTube, search Wanda Nero Butler 'Hey Y'all'

Wanda Nero Butler

I don't know, but a rendition of it may be on Timothy Britten's upcoming sophomore CD.  They sang it during the recording in a medley so I hope it will make the cut.  Look out for it in a few months