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Fashion Face-Off: Kelly Osbourne vs. Rihanna

Kelly Osbourne, Rihanna Fame Pictures; INFdaily.com

Sweatshirt dresses can be seriously stylish.

Just ask Kelly Osbourne and Rihanna, who both wore this gray 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 Louboutin leopard-print boots, bracelets and a military-inspired hat, plus 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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