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01:03 — Peterson has worked with the Kardashians.
01:02 — Peterson has worked with the Kardashians.
03:58 — How do celebrities manage to look so fit and toned on the Golden Globes red carpet? TODAY style expert Lilliana Vazquez reveals some of the secrets of (more…)
01:48 — Personal trainer to the stars Gunnar Peterson -- who's credited with helping to shape the enviable bodies of Jennifer Lopez Sofia Vergara and the Kard (more…)
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Here's how everything changed in "Chapter 6"