Singer's bottom is popular on red carpet

Rihanna‘s bum seemed to be the star attraction at the Met Ball on Monday night.

The singer, 26, had pals Cara Delevingne and Stella McCartney both vying to grab her tush as they posed together on the red carpet at the glam New York event.

Ri-Ri – who wowed in a fitted white skirt and matching crop top – was groped by designer Stella, 42, as the group stood with their arms around each other for pictures.

But Cara, 21, didn’t seem too happy about Stella‘s cheeky squeeze and placed her hand on the fashionista’s arm before touching Rihanna‘s bottom herself.

The model, who is believed to be dating actress Michelle Rodriguez, has been close friends with Ri-Ri for some time and they happily got touchy-feely in front of the cameras.

Rihanna was snapped touching Cara‘s toned midriff and also placed her hand on her pal’s wrist as they chatted.

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Anna Francis