Backless bras come in many styles, which mainly fall into the categories of: sticky bras, backless bustiers, backless bodysuits, nipple covers (some of which simultaneously lift the breast), and breast tape
So, a tuxedo isn't required, but the event is still formal enough for one to be appropriate
(It failed to click in the U.K., though, peaking there at just #32.) Related: Another 1972 classic, this one from the Rolling Stones, that you likely dont know the lyrics The song represents the Hollies highest charting hit in America, ahead of such favorites as Bus Stop (#5), Stop Stop Stop (#7), and Carrie Anne (#9)
I have a decent selection of 1920s dressesunless, of course, were talking about evening attire, of which I have none