Stunning Stars Amp Up the Excitement at New York Fashion Week

Kendall Jenner showed off her stems at the Victoria's Secret Angels book event on Wednesday.

Justin Theroux was solo at the Boss show on Wednesday.

Zoe Saldana showed off her growing baby bump at the Boss fashion show on Wednesday.

Kate Bosworth attended the Boss show on Wednesday.

Olivia Munn and Jessica Chastain posed in the front row of the Michael Kors show on Wednesday.

Paris Hilton posed backstage at the Michael Costello show in NYC on Tuesday.

Serena Williams showed her Signature Statement collection on Tuesday.

Britney Spears wore a low-cut orange jumpsuit for the exclusive unveiling of her lingerie and sleepwear line on Tuesday.

Iggy Azalea and her boyfriend, Nick Young, held hands on the red carpet at the Reveal Calvin Klein fragrance launch party on Monday.

Rachel Zoe and Rodger Berman stayed close at the Tod's boutique opening on Monday night.

Naomi Campbell wore a sequined minidress for the Badgley Mischka show on Tuesday.

Sophia Bush wore all black for a Samsung event on Friday night.

Uma Thurman was on hand for the Zac Posen show on Monday.

Derek Jeter stepped out for the Nike/Levi's Kids fashion show on Monday.

Anna Chlumsky posed for photos in the front row at Zac Posen on Monday.

Girls star Allison Williams attended the Rag & Bone show on Monday.

Jennifer Hudson struck a pose at InStyle's 20th-anniversary party on Monday.

Just weeks after welcoming her baby daughter, model Doutzen Kroes stepped out for the Reveal Calvin Klein fragrance launch party on Monday.

Nicky Hilton attended the Samsung event on Friday.

Rita Ora wore a black leather dress and red lipstick for the Reveal Calvin Klein party on Monday.

Lily Aldridge looked gorgeous at the Tory Burch presentation on Tuesday.

Dakota Fanning sported shades of ivory for Rodarte's NYFW show on Tuesday.

Nicole Kidman kept things classy at the Tod's boutique opening on Monday.

Amber Heard and Rosario Dawson shared a laugh at the Reveal Calvin Klein fragrance launch party on Monday night.

Rihanna was in good spirits at the Alexander Wang show on Saturday.

Nicki Minaj made an unforgettable arrival outside the Alexander Wang show on Saturday.

Karlie Kloss's dress revealed her tan at the Harper's Bazaar celebration on Friday.

Kendall Jenner flaunted her glamorous dress at the Harper's Bazaar event on Friday.

Jada Pinkett Smith stood out at Christian Siriano's show on Saturday.

Uzo Aduba glowed at Christian Siriano's show on Saturday.

Lily Aldridge and Gigi Hadid were a picture-perfect duo at the Prabal Gurung show on Saturday.

Rihanna showed off her stems at the Altuzarra show on Saturday.

Rashida Jones went with a colorful look for the Rebecca Taylor show on Saturday.

Shay Mitchell revealed her cleavage in a flattering number at the Zimmermann fashion show on Friday.

Rihanna goofed around with designer Adam Selman after his presentation on Friday.

On Friday, Kate Upton accepted the social media award at the Fashion Media Awards.

Lady Gaga got a sweet kiss from her boyfriend, Taylor Kinney, at the Harper's Bazaar Celebrates Icons by Carine Roitfeld event on Friday.

Gwen Stefani joined the models on the runway at her L.A.M.B. event on Friday.

Laverne Cox and Naomi Campbell linked up with stylist Edward Enninful at the Fashion Media Awards on Friday.

Gwen Stefani and Gavin Rossdale got cute backstage at her L.A.M.B. show on Friday.

Lily Aldridge glowed at the Harper's Bazaar Celebrates Icons by Carine Roitfeld event on Friday.

Sarah Jessica Parker made a bold entrance at Thursday evening's Gareth Pugh presentation.

Jamie Chung gave a twirl at the BCBG Max Azria show on Thursday.

Jessica Lowndes showed a sliver of midriff at the Houghton runway show on Thursday.

Pretty Little Liars star Shay Mitchell was dressed in black and white for Thursday's BCBG Max Azria show.

Kate Mara stepped out for the H&M/Vogue panel discussion on Thursday.

Rosario Dawson posed backstage with a model at the Desigual event on Thursday.

Padma Lakshmi wore a fitted green dress for Thursday's Costello Tagliapietra runway show.

Model Coco Rocha hung backstage at Marissa Webb's presentation on Thursday.

Joe and Nick Jonas sat front row for Thursday's Todd Snyder show.

Tyson Beckford posed in the front row at the Parke & Ronen show on Thursday.

Gaby Hoffmann showed off her growing baby bump at the Rachel Comey presentation in New York on Thursday.

Adrian Grenier attended the Gareth Pugh show on Thursday.

Maggie Gyllenhaal showed up at the Gareth Pugh fashion show on Thursday evening.

Whoopi Goldberg and her granddaughter Jerzey Dean sat front row together for the Stella Nolasco show on Friday.

Jamie Chung was on hand for the launch of the Marchesa Voyage for ShopStyle collection on Friday.

The Hunger Games star Willow Shields struck a pose in the front row at Peter Som's show on Friday.

Actress Zoe Kazan attended the Peter Som show on Friday morning.

Olivia Palermo helped launch the Marchesa Voyage for ShopStyle collection on Friday.

Sarah Jessica Parker and Anna Wintour had a good laugh at the Calvin Klein show on Thursday.