Kelly Osbourne, Rihanna

Fame Pictures; INFdaily.com

Sweater dresses can be seriously stylish.

Just ask Kelly Osbourne and Rihanna, who both wore this grey Marc Jacobs number recently.

Kelly chose the cozy chic creation during her Dancing With the Stars downtime, wearing it while shopping with her mom on Robertson Boulevard.

RiRi opted for the oversize-sleeved outfit for a flight to Berlin.

But the ladies managed to make the same dress into totally different ensembles with their accessories...

Rihanna opted for a looser fit and added fierce leopard print boots, bracelets and a military-inspired hat, plus bright red lips.

Kelly glammed hers up with a belt, peep-toe pumps and a big pair of sunglasses.

Who looks most stylish in this sweater dress? Sound off on this and more star style in Fashion Police!

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