[ helen can't blame her. they're very interesting, each with a fascinating piece of history. ]
Flappers came about in the time period known as the Roaring Twenties and were generally women who stuck their noses up at the social norms. You can see Rebekah's style of dress is much different from the long dresses with long hair and little make-up that the previous decades had. Hippies were most known for their peace movements, though you can see they also turned up their noses in a way to the acceptable social norms. They preferred very bright and complicated patterns.
[ and a victorian man dressed up as a hippie will forever amuse her, as evidenced by the amused grin she's trying to hide now. ]