Zac Posen drew in a star studded front row for his Spring/Summer 14 show, while Rebecca Minkoff surprised her audience.
The two stars showed off their assets in figure hugging outfits, with Christina complimenting her red hair with a red silk dress that fell to her knees. Kelly opting for a green number with a plunging neckline, accessorising with a white clutch bag and a slick of orange lipstick.
Elsewhere at New York Fashion Week Diane Von Furstenberg also had a stellar star turn out.
Jessica Alba, Nicky and Paris Hilton and Sheryl Crow were just some of the A-list to make up the front row.
"Diane is like the first rock designer for females, she's in her own category," Sheryl told WWD. The singer kept things simple in a black mini-dress with leather panelling.
The designer has just celebrated a milestone anniversary, with her signature wrap dress reaching its 40th year as a fashion staple.
It was a pop star take over at the Opening Ceremony event, with two of the biggest singing stars making an appearance.
Justin Bieber looked casual in a long sleeved white T-shirt, accessorised with his mandatory backwards cap and sunglasses. He also wore a large chain to give some extra bling factor.
Rihanna kept it covered in a low cut knee-length grey dress that just showed the top of her chest tattoo.
She added a thick black choker, as well as black tights and a slick of dark plum lipstick for an on-trend grunge look.
At the DKNY show, the label celebrated its 25th year.
Closing the show was Rita Ora, who recently took over from her best pal Cara Delevingne as the face of the iconic label.
The singer strutted down the catwalk in a nineties-inspired ensemble which included a black and white T-shirt bearing the DKNY logo.
Fashion lovers were in for a surprise at the Rebecca Minkoff show on Friday, when Janelle Monáe performed on stage as the models walked down the catwalk.
She sang a live soundtrack for the collection's showcase, which included leather miniskirts and bright dresses.
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