Jennifer Lopez Shows Off Her Fab Abs During A Workout But THIS Thing Stole Her Trainer’s Attention!

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Remember the other day when Jennifer Lopez was leaving the gym with her shirt inside out?

Well, we know how it got that way!

The 45-year-old singer was doing a tough arm workout with trainer Tracy Anderson, and even though J. Lo’s body had all of our attention, Miz Anderson couldn’t say the same.

[ Photos: 10 Celebs Dish On Their Favorite Part Of Exercising! ]

She stopped mid-workout to crouch and read another page from Lena Dunham‘s new book Not That Kind Of Girl.

Miz Lopez’s reaction was pretty priceless!

Ch-ch-check it out (below)!

I’m gonna lose my job over this brilliant book @lenadunham @jlo #jlotookmybook #backtowork #notthatkindofgirl

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Tags: body, bookz, fitness, health, Jennifer Lopez, Jennifer Lopez photos, Jennifer Lopez workout, Lena Dunham, Not That Kind Of Girl,

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