Paris Fashion Week may be coming to an end, but that's every reason for the stars to revel in the moment — and flaunt their boldest looks. Carine Roitfeld's CR Fashion Book launch party was just the excuse they needed. And since we happen to be in the right mindset to pick up on trends, we couldn't believe how many plunging necklines we spotted. From Rosie Huntington-Whiteley and Cara Delevingne in statement stripe-covered jumpsuits to Joan Smalls and Selena Gomez in elegant satin numbers, this was the only way to send Fashion Month out with a bang. (And yes, Justin Bieber even made an appearance, too). Scroll down to see all the photos of the stars debuting their sexiest looks along with some celebratory snaps — consider this the grand finale of Fashion Month.
Kendall Jenner in Givenchy at the CR Fashion Book launch party.
Rosie Huntington-Whiteley in Balmain at the CR Fashion Book launch party.
Selena Gomez in Louis Vuitton at the CR Fashion Book launch party.
Joan Smalls in Givenchy and Cara Delevingne at the CR Fashion Book launch party.
Paris Hilton and Nicky Hilton at the CR Fashion Book launch party.
Carine Roitfeld in Givenchy at the CR Fashion Book launch party.
Kris Jenner, Kim Kardashian, Carine Roitfeld, Riccardo Tisci, and Ciara at the CR Fashion Book launch party.
Gigi Hadid, Justin Bieber, and Kendall Jenner at the CR Fashion Book launch party.
Carine Roitfeld at the CR Fashion Book launch party.
Paris Hilton at the CR Fashion Book launch party.
Riccardo Tisci, Karl Lagerfeld, Carine Roitfeld, and Kim Kardashian at the CR Fashion Book launch party.