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celebs wearing the fitness trend

#1/20:

Look at those fit legs!

#1/20:

Look at those fit legs!

Jessica Biel sports her fitness gear at the Revlon Walk.
#2/20:

Cameron Diaz

#2/20:

Cameron Diaz

Looking dazzling, even after hanging at the gym.
#3/20:

Katy Perry

#3/20:

Katy Perry

Katy chooses funky running shorts and plain top when running around town.
#4/20:

Ashley Greene

#4/20:

Ashley Greene

The Twilight star displays a pop of color under her black workout gear.
#5/20:

J Alba

#5/20:

J Alba

Jessica Alba looks laid back and sporty in her basic workout attire.
#6/20:

Fit Kardashians

#6/20:

Fit Kardashians

The Kardashian sisters manage to look fabulous after hitting the gym.
#7/20:

Feelin' bright

#7/20:

Feelin' bright

Ellen Pompeo livens up her gym clothes with a bright zip hoodie.
#9/20:

Kim K

#9/20:

Kim K

Kim Kardashian gives up her favored animal print for simple gym basics.
#11/20:

Shenae Grimes

#11/20:

Shenae Grimes

The young actress opts for a casual shirt and running shorts.
#12/20:

Kristin Cavallari

#12/20:

Kristin Cavallari

The California blonde sports a colorful shirt during Dancing with the Stars rehearsals.
#13/20:

Elisabetta Canalis

#13/20:

Elisabetta Canalis

This Italian babe works out in a sports bra and track pants.
#14/20:

Matchy-matchy!

#14/20:

Matchy-matchy!

Karina Smirnoff perfectly matches her workout wear.
#15/20:

Running girl

#15/20:

Running girl

Reese Witherspoon opts for a touch of color in her running pants.
#16/20:

All about layers

#16/20:

All about layers

Ashley Greene layers a casual tee over an aqua tank.
#17/20:

Fitness fashionista

#17/20:

Fitness fashionista

Charlize Theron looks fashionable even when heading to the gym.
#18/20:

Ashley Greene

#18/20:

Ashley Greene

Ashley Greene keeps her gym outfit simple with a grey tee and black workout pants.
#19/20:

Reese Witherspoon

#19/20:

Reese Witherspoon

Reese opts for bright colors when unwinding at Yoga.
#20/20:

Khloe Kardashian

#20/20:

Khloe Kardashian

The always glam star keeps it simple at the gym with an aqua hoodie and leggings.
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