YH hangs out with "Vampire Diaries" star and singer/dancer Kat Graham at her dance studio to get the scoop on her hot singles "Wanna Say" and "Power" and the inspiration behind the music videos for each! She also shares her thoughts on the evolution of her hit TV series, and then it's time to kick it old school with Kat and her choreographers, Mark and Oscar, who teach us how to do the "1991"! Hosted by Lesley Robins (@lesleymia).