Leave it to Rihanna to shake up Paris Fashion Week - without even hosting a show. In the midst of all the hustle and bustle, the singer and designer surprise-dropped a new see-now, buy-now Fenty collection online. And while she may have preferred an unorthodox approach to showing the line, the bad gal would never miss the opportunity to throw the traditional Fashion Week after-party.

Last night, fashion insiders and It Girls, including Bella and Gigi Hadid, Luka Sabbat, and Sita Abellan raged in their new Fenty gear at 1 OAK's Paris pop-up, alongside owner Richie Akiva. Kitty Cash and DJ Tito kept spinning until the wee hours, keeping all the A-listers on their very stylish feet.

Click through for an inside look!

[Photos courtesy 1 OAK/BFA]