On Thursday night, Britney Spears kept fans up late for the premiere of her music video for "Slumber Party" featuring Tinashe, and it was certainly worth the wait. The video starts with the singer arriving at a huge mansion and proceeding to strut her stuff down the hallway in a tiny red dress. Not only does she show off her impressive dance moves (and gorgeous figure!), but the sultry and fun vibe will definitely give you major flashbacks to her "Me Against the Music" days. There's definitely a reason she named this album Glory, because she keeps proving that she belongs on top.