View From the Red Carpet: Tracy Anderson Perfects Jennifer Lopez's Backside

Workout guru Tracy Anderson's client list famously includes Gwyneth Paltrow, Beyoncé, Kim Kardashian, and Gisele, and at one time, also Madonna. Anderson is now also in charge of a national treasure, Jennifer Lopez's backside. At the Cinema Society premiere of Dom Hemingway, sponsored by Moët and Links of London, she told us about the half hour of every exercise session they devote to this singular piece of anatomy.

What do you find remarkable about Jennifer Lopez in person? "You know what I love about her? She is aging so gracefully. She is so in touch with her youthful spirit, I almost believe that she is never going to age. Every time I see her, I'm thinking, 'Really?' She's so youthful inside, it just penetrates to the outside."

What's the game plan for J.Lo's famous tush? "She does my method, which includes muscular structure work and between 9 and 13 different exercises that change every ten days. And dance aerobics as well. I keep [her butt] toned and in position. We do planks, moving the legs and butt at different angles. Do you want me to get down and do them all?"

How long is a Lopez session, and how much of that is devoted to her backside?"One hour...and 30 minutes."

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