Betty Renne had a  45 on New Art (part of Newtown) in 1962 and another on Lawn ...both Philadelphia labels. Are there other 45s  known to exist ?

Clutching at straws .....would Betty Renay   be the same artiste recording in Detroit with Lasker  later on ....?   And can we  rule out Betty James  (with the classic Cee Jay record "little mixed up" as being another  different artiste who just happens to  have  that same real name, Betty Rene ?)

The Betty Renne who recorded for Nu-Art/ Lawn is Betty Renee Garvin. She was an early member of the Bluebelles but left the group before they recorded. 

Yes,Betty Renne is definitely not Betty James,as the 'I'm A Little Mixed Up' lady was a mature,if not middle-aged (her band included her husband on guitar and her son on bass)  classic Blues singer with a contralto voice,while  Miss Renne had a sweet,high soprano voice ,rather like a favourite of mine,yet another Bette,the  underrated Bette McLaurin;a great,forgotten female R&B artist of the 50's-and she made a few fine Soul recordings in the 60's,too.

Betty Renay,who recorded in Michigan is a different artist again,I think