Although all of Jean's earlier movie roles depicted here were in silent films, primitive microphones are always seen on sets and in one scene a musical number is even being rehearsed.
Jean's family home on the outside is shown to be a in a bungalow court, but the supposed interiors shown are much too large to fit into such a small structure.
Jean complains about having to report to the studio at 5 a.m. each morning but the shadows as she leaves home are clearly midday.
Carroll Baker's 1965 "Flip" hairstyle was unheard of during the 1920's when the action of the film starts.
While on personal appearance tour, Harlow performs 1960s-style twist dance steps in scene supposedly set in the 1930s.
In a scene set in late 1920s, Jean pays her agent with 1960s-era currency which looks quite different.
Jean's stepfather plays a 33 rpm long player on a record player years before they replaced 78 rpm discs.