A 1960s champagne beaded gown bears a striking resemblance to the Pucci gown featured in a 1967 Ladies Home Journal. (see below).
One piece Palazzo pant jumpsuit? Yes, wide legged jumpsuit that look like a gown, but more comfortable - except, of course, when one has to use the lady's - then you're on your own.
Read (at your own risk) about the history of Palazzopants at Palazzodiva.com.