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Celebs all have their own fitness routine - some enjoy powerwalking, some like to shop, and others hit the stairs to work up a sweat.

We caught serious cyclist Dr. McDreamy rocking some spandex and taking a ride on his bike the other day.

While not all celebs get decked out in spandex for a spin around the block, there are plenty of them who enjoy spending time on two wheels (and look good while doing it!), so we dedicated a gallery to them.

CLICK HERE to check out Celebrity Cyclists!