Who sang Midnight at the oasis?

"Midnight at the Oasis" is a 1973 rock song which was performed by singer Maria Muldaur and was her best known hit, peaking at #6 on the Billboard Hot 100

But, the most recent version of this song was recorded by the group Brand New Heavies & reached #13 in the UK charts.

Also, in 1975, a cover version of "Midnight at the Oasis" appeared on the album "Dust Yourself Off" by the funk band Pleasure

I imagine you mean the Brand New Heavies version.