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    Celeb Gym Buddies! Nikki Reed and Julianne Hough Smile After Workout; Minka Kelly and Mandy Moore Go Boxing

    Nikki Reed, Julianne Hough Courtesy of WENN

    It's always better to hit the gym when you have a buddy by your side—and it looks like these celebs seem to agree. 

    Instead of working up a sweat with a personal trainer, Julianne Hough opted to call up her pal Nikki Reed, who joined the blond beauty for a workout sesh on Wednesday, which clearly put a smile on the celebs' pretty faces. 

    Both ladies were dressed in black workout capris and a pair of dark shades as they smiled from ear to ear while out for a stroll. Reed completed her look with a casual black shirt which she wore over what appeared to be a striped sports bra while Hough sported a black and gray Under Armour jacket.

    NEWS: Julianne Hough talks "wonderful" new boyfriend Brooks Laich

    Minka Kelly, Mandy Moore, Instagram Instagram

    Meanwhile, besties Minka Kelly and Mandy Moore also hit the gym together this week, opting for a little boxing sesh to prove they are both beautiful and badass. 

    "We pack a mean punch. Well actually @minkak does and I'm just trying to copy her bad-ass-ness.#firsttimeboxing #fitnessandfriendship," the 29-year-old singer-songwriter captioned the shot of the twosome where they are posing with their arms in a punching position while looking as if they worked up a serious sweat. 

    Both gals look gorgeous even while sweaty and sans makeup and the former Friday Night Lights star is rocking a loose white tank top which shows off her impressive guns. Werk, girl! 

    Perhaps these four should team up for an epic celeb workout sesh? We'll bring the weights! 

    PHOTOS: Celebrity Fitness Stars