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Dog-Walking Styles of the StarsBlake Lively and Penny are on set, Carrie Underwood keeps it casual in sweats, and Jerry O'Connell jogs
Credit: Startraks, Pacific Coast News, Splash News Online
Updated: Wednesday Jan 12, 2011 | 06:00 AM EST
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The Gossip Girl star keeps her toy poodle Penny on set. Whether they're emerging from Lively's trailer or sitting down between takes, they're always in step.
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