Wait, what? Rihanna covers up in an Eighties suit jacket at the Billboard Music Awards

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Billboard Music Awards - Las Vegas

Rihanna has never been afraid of a daring red carpet ensemble but she took an entirely different approach for the Billboard Music Awards in Las Vegas.

Instead she power dressed in a bizarre olive green long suit jacket teamed with high heels.

Rihanna arrives at the Billboard Music Awards at the T-Mobile Arena
(Richard Shotwell/AP)

Her on-stage outfit for her performance of Love On The Brain was equally baffling, with the singer sporting smart, pressed trousers and a bright green fur stole.

Rihanna performs
(Chris Pizzello/AP)

She kept it green as she collected her Billboard chart achievement award in a leopard-print green maxi with gold trim.

Rihanna accepts the billboard chart achievement award at the Billboard Music Awards at the T-Mobile Arena
Rihanna accepts the billboard chart achievement award at the Billboard Music Awards at the T-Mobile Arena (Chris Pizzello/AP)

Ariana Grande also opted for an odd dress, choosing a blue print gown with cut-out panels, teamed with her signature high ponytail.

Ariana Grande arrives at the Billboard Music Awards at the T-Mobile Arena
(Richard Shotwell/AP)

Halsey was another starlet who didn't shy away from cut-outs, sporting this strange gown with tattoo-baring slits.

Halsey arrives at the Billboard Music Awards at the T-Mobile Arena
(Richard Shotwell/AP)

Demi Lovato got Rihanna's memo to keep things business-like, teaming her wide leg trousers with a tweed suit jacket and a sheer lace vest that flashed her bra, as well as black leather gloves with purple fingertips.

Demi Lovato arrives at the Billboard Music Awards at the T-Mobile Arena
(Richard Shotwell/AP)

Slightly less business-like was singer-songwriter Z LaLa, who donned a large crinoline and huge headpiece for the red carpet.

Z LaLa arrives at the Billboard Music Awards at the T-Mobile Aren
(Richard Shotwell/AP)

Maybe the Vegas heat went to their heads.