Well Cosy I think this is the answer….
“At the time of this performance, the “random back-up” singer was Jeff’s GF. Her name is Rosie Vela and she is a seriously accomplished musician in her own right. She has an education in classical music, vocals and piano. In addition she worked as a high end model in her 20’s. She has several albums of her own out there. I believe she was born 12-18-52. The original members were not available for this. Kelly was dead and Bev Bevens had a falling out with Jeff years ago over money”
She sings again on this one…… which I think is the very best performance of Mr Blue Sky !